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pcof - Python Collection Of Functions

Build Status PyPI - Python Version PyPI codecov GitHub License Code style: black

pcof is a collection of small useful functions.

Installation

pip install pcof

Most of the functions do not have any external dependencies. If your script does not use any pcof function with dependencies, then you can install pcof and ignore its dependencies.

pip install --no-deps pcof

Usage Example

>>> from pcof import bytesconv

>>> bytesconv.bytes2human(88191837473)
('82.14', 'GB')
>>> bytesconv.bytes2human(88191837473, unit='MB')
('84106.29', 'MB')
>>> bytesconv.bytes2human(88191837473, unit='MB', precision=0)
('84106', 'MB')

>>> bytesconv.human2bytes(100, 'GB')
'107374182400.00'
>>> bytesconv.human2bytes(100, 'GB', base=1000)
'100000000000.00'

>>> bytesconv.bandwidth_converter(100, from_unit="Mbps", to_unit="MB")
(12.5, 'MB/seconds')
>>> bytesconv.bandwidth_converter(10, from_unit="Gbps", from_time="seconds", to_unit="GB", to_time="minutes")
(75.0, 'GB/minutes')
>>> bytesconv.bandwidth_converter(6, from_unit="GB", from_time="hours", to_unit="Mbps", to_time="seconds")
(13.333333333333334, 'Mbps/seconds')

>>> from pcof import datetimefunc

>>> datetimefunc.epoch_time_now()
1591041372
>>> datetimefunc.epoch_time_min_ago(60)
1591037781
>>> datetimefunc.epoch_time_hours_ago(12)
1590998197
>>> datetimefunc.epoch_time_days_ago(30)
1588449403

>>> datetimefunc.epoch_time_to_human(1590175926)
'Fri May 22 16:32:06 2020'
>>> datetimefunc.epoch_time_to_human(1590175926, utc='yes', date_format='%m/%d/%Y %H:%M:%S')
'05/22/2020 19:32:06'

>>> datetimefunc.seconds_to_human(300)
'5 Minutes'
>>> datetimefunc.seconds_to_human(310)
'5 Minutes, 10 Seconds'
>>> datetimefunc.seconds_to_human(8481083)
'3 Months, 8 Days, 3 Hours, 51 Minutes, 23 Seconds'

>>> datetimefunc.time_unit_conversion(90, from_unit="days", to_unit="months")
'3'

>>> from pcof.pct import x_pct_of_number
>>> x_pct_of_number(40, 200) # 40% of 200
'80.00'

>>> from pcof import printtable
>>> header = ["col1", "col2"]
>>> rows = [ ["line1_col1", "line1_col2"], ["line2_col1", "line2_col2"] ]
>>> pcof.print_table(header, rows)
    +------------+------------+
    |    col1    |    col2    |
    +------------+------------+
    | line1_col1 | line1_col2 |
    | line2_col1 | line2_col2 |
    +------------+------------+

>>> from pcof import misc
>>> misc.checksum_file("tests/file_checksum.txt")
'f133e784590eae8c07dac9295ae50344731090dbfc848c1d77d0af4a79a56f21'
>>> misc.checksum_file("tests/file_checksum.txt", algorithm='md5')
'f978067032b567b197cef53a4d463a89'

>>> import time
>>> from pcof import decorators
>>> @decorators.time_elapsed(print_info=True)
... def myfunc():
...    time.sleep(1)
...
>>> myfunc()
Decorator time_elapsed: myfunc args: () kwargs: {} -  elapsed time 1.0012 seconds. This function all execution elapsed time: 1.0012 seconds
>>> myfunc()
Decorator time_elapsed: myfunc args: () kwargs: {} -  elapsed time 1.0011 seconds. This function all execution elapsed time: 2.0023 seconds

>>> from pcof.downloadfile import download_file
>>> download_file("http://google.com/favicon.ico", "/tmp/google.ico")

List of available functions

Functions

Module Name Description Dependencies
misc msg Print colored text. -
misc send_email Send an email using smtplib module. -
misc setup_logging Configure logging. -
misc nested_dict Return a nested dictionary (arbitrary number of levels). -
misc find_key Return a value for a key in a dictionary. -
misc return_dict_value Return a value from a dictionary. -
misc run_cmd Execute a command on the operating system. -
misc checksum_file Return checksums (hash) of a file. -
bytesconv bytes2human Convert number in bytes to human format. -
bytesconv human2bytes Convert size from human to bytes. -
bytesconv bandwidth_converter Bandwidth Calculator. -
datetimefunc epoch_time_to_human Convert a unix epoch time to human format. -
datetimefunc epoch_time_now Return current date and time in unix epoch time format. -
datetimefunc epoch_time_min_ago Return current date and time less x minutes in unix epoch time format. -
datetimefunc epoch_time_hours_ago Return current date and time with less x hours in unix epoch time format. -
datetimefunc epoch_time_days_ago Return current date and time with less x days in unix epoch time format. -
datetimefunc time_unit_conversion Convert number from a time unit to another time unit. -
datetimefunc seconds_to_human Convert number in seconds to human format. -
pct y_what_pct_of_x Calculate the percentage of number1 to number2. -
pct x_pct_of_number Calculate what is the x% of a number. -
pct pct_change_from_x_to_y Calculate percent increase/decrease from number1 to number2. -
printtable print_table Print table using module prettytable. prettytable
pytz convert_datetime_to_tz Convert a date to a specific timezone. pytz
downloadfile download_file Download a file. requests

Decorators

Module Name Description Dependencies
decorators num_calls Count the number of times a function is called. -
decorators time_elapsed Calculate elapsed time in seconds. -
decorators debug Show function parameters and return values. -
decorators retry_on_exception Retry function execution if exception raises. -

Documentation (automatically generated using pydoc)

Help on module misc:

NAME
    misc - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Miscellaneous functions

FUNCTIONS
    checksum_file(filename, *, algorithm='sha256', block_size=1048576)
        Return checksums (hash) of a file.

        Arguments:
            filename           (str): file to check hash

        Keyword arguments (opt):
            algorithm          (str): algorithm used to calculate hash.
                                      default: sha256
            block_size         (int): chunk size to read the file (bytes)

        return:
            hex-encoded string

        Example:
        >>> checksum_file("my_file") # doctest: +SKIP
        '179b8c9510b2f068b94286c86610c6fe633ca44b5e541837ae9461bbdace7191'
        >>> checksum_file("my_file", algorithm="md5") # doctest: +SKIP
        'bdc28791ea81bafa7601e98f68b692e5'

    find_key(dict_obj, key)
        Return a value for a key in a dictionary.

        Function to loop over a dictionary and search for an specific key
        It supports nested dictionary

        Arguments:
            dict_obj    (obj): A list or a dictionary
            key         (str): dictionary key

        Return:
            (list)           : a list with values that matches the key

        Example:
        >>> x = {"A1": "A", "B1": { "A2": "AA"} }
        >>> find_key(x, "A1")
        ['A']
        >>> find_key(x, "A2")
        ['AA']
        >>> find_key(x, "YY")
        []
        >>> x = {"A1": "A", "B1": { "A1": "AA"} }
        >>> find_key(x, "A1")
        ['A', 'AA']

    msg(color, msg_text, exitcode=0, *, end='\n', flush=True, output=None)
        Print colored text.

        Arguments:
            color          (str): color name (blue, red, green, yellow,
                                  cyan or nocolor)
            msg_text       (str): text to be printed
            exitcode  (int, opt): Optional parameter. If exitcode is different
                                  from zero, it terminates the script, i.e,
                                  it calls sys.exit with the exitcode informed

        Keyword arguments (optional):
            end            (str): string appended after the last char in "msg_text"
                                  default a newline
            flush   (True/False): whether to forcibly flush the stream.
                                  default True
            output      (stream): a file-like object (stream).
                                  default sys.stdout

        Example:
            msg("blue", "nice text in blue")
            msg("red", "Error in my script. terminating", 1)

    nested_dict()
        Return a nested dictionary (arbitrary number of levels).

        Example:
        >>> mydict = nested_dict()
        >>> mydict['a1']['b1']['c1'] = 'test_1'
        >>> mydict['a1']['b2'] = 'test_2'
        >>> mydict['a1']['b3'] = 'test_3'
        >>> mydict.keys()
        dict_keys(['a1'])
        >>> mydict['a1'].keys()
        dict_keys(['b1', 'b2', 'b3'])
        >>> mydict['a1']['b1'].keys()
        dict_keys(['c1'])
        >>> mydict['a1']['b1']['c1']
        'test_1'
        >>> mydict['a1']['b2']
        'test_2'
        >>> print(mydict) # doctest: +SKIP
        defaultdict(<function nested_dict at 0x7f0239f4aee0>,
            {'a1': defaultdict(<function nested_dict at 0x7f0239f4aee0>,
            {'b1': defaultdict(<function nested_dict at 0x7f0239f4aee0>,
                {'c1': 'test_1'}),
            'b2': 'test_2',
            'b3': 'test_3'})})

    return_dict_value(dictionary, keys, *, ignore_key_error=False)
        Return a value from a dictionary.

        Recursively iterate over a dictionary and return value
        for the key. Key must be a list. Each element of the list refers
        to the level of the dicionary

        It helps to reduce number of code lines when we need to perform may
        try: except: to catch KeyErrors

        Arguments:
           dictionary              (dict): Dictionary
           keys                    (list): List with key(s)
           ignore_key_error  (True/False): Ignore key not found errors:
                                             True  - return '' if key not found
                                             False - raise exception
                                           default: False

        Example:
        >>> mydic = { 'a': 'value_a',
        ...           'b': {
        ...                  'b1': 'value_b1',
        ...                  'b2': 'value_b2'
        ...                },
        ...           'c': {
        ...                  'c1': {
        ...                          'c11': 'value_c11',
        ...                          'c12': 'value_c12'
        ...                         }
        ...                },
        ...          }
        >>> return_dict_value(mydic, ['a'])
        'value_a'
        >>> return_dict_value(mydic, ['b'])
        {'b1': 'value_b1', 'b2': 'value_b2'}
        >>> return_dict_value(mydic, ['b', 'b1'])
        'value_b1'
        >>> return_dict_value(mydic, ['c', 'c1', 'c12'])
        'value_c12'
        >>> return_dict_value(mydic, ['c', 'c1', 'c13'])
        Traceback (most recent call last):
        ...
        KeyError: 'c13'
        >>> return_dict_value(mydic, ['c', 'c1', 'c13'], ignore_key_error=True)
        ''
        >>> return_dict_value(mydic, ['x'], ignore_key_error=True)
        ''

    run_cmd(cmd)
        Execute a command on the operating system.

        Arguments:
            cmd    (str): the command to be executed

        Return:
            - If command complete with return code zero
            return: command_return_code, stdout

            - If command completes with return code different from zero
            return: command_return_code, stderr


        Example:
        >>> run_cmd("echo test")
        (0, 'test\n')
        >>> run_cmd("cmd_does_not_exist") # doctest:+ELLIPSIS
        (127, '...cmd_does_not_exist:...not found\n')

    send_email(mail_from, mail_to, subject, body, mailserver='localhost')
        Send an email using smtplib module.

        Arguments:
            mail_from        (str): send email from this address
            mail_to          (str): send email to this address
            subject          (str): mail subject
            mail_server (str, opt): mail server address. Default is localhost

    setup_logging(logfile=None, *, filemode='a', date_format=None, log_level='DEBUG')
        Configure logging.

        Arguments (opt):
            logfile     (str): log file to write the log messages
                                   If not specified, it shows log messages
                                   on screen (stderr)
        Keyword arguments (opt):
            filemode    (a/w): a - log messages are appended to the file (default)
                               w - log messages overwrite the file
            date_format (str): date format in strftime format
                               default is %m/%d/%Y %H:%M:%S
            log_level   (str): specifies the lowest-severity log message
                               DEBUG, INFO, WARNING, ERROR or CRITICAL
                               default is DEBUG
Help on module bytesconv:

NAME
    bytesconv - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Bytes calculator

FUNCTIONS
    bandwidth_converter(number, *, from_unit, to_unit, from_time='seconds', to_time='seconds')
        Bandwidth Calculator.

        Convert data rate from one unit to another.

        Arguments:
            number     (int): number to be converted

        Keyword arguments:
            from_unit  (str): convert from this data unit. Example:
                              (bps, Kbps, Mbps, Gbps... KB, KiB, MB, MiB...)
            to_unit    (str): convert to this data unit. Example:
                              (bps, Kbps, Mbps, Gbps... KB, KiB, MB, MiB...)

        Keyword arguments (opt):
            from_time  (str): Specify the time frame used in from_unit
                              (seconds, minutes, hours, days, months)
                              default: seconds
            to_time    (str): Specify the time frame used in to_unit
                              (seconds, minutes, hours, days, months)
                              default: seconds

        bps, Kbps, Mbps, Gbps... = decimal base = 1000^n
        KB, MB, GB, TB...        = decimal base = 1000^n
        KiB, MiB, GiB, TiB...    = binary base  = 1024^n

        References:
            - https://en.wikipedia.org/wiki/Units_of_information
            - https://physics.nist.gov/cuu/Units/binary.html

        Returns: tuple
           (number_converted, to_unit/to_time)

        Example:
        >>> bandwidth_converter(100, from_unit="Mbps", to_unit="MB")
        (12.5, 'MB/seconds')
        >>> bandwidth_converter(100, from_unit="Mbps", to_unit="GB", to_time="hours")
        (45.0, 'GB/hours')
        >>> bandwidth_converter(1, from_unit="Gbps", to_unit="MB")
        (125.0, 'MB/seconds')
        >>> bandwidth_converter(10, from_unit="Gbps", to_unit="GB")
        (1.25, 'GB/seconds')
        >>> bandwidth_converter(10, from_unit="Gbps", to_unit="TB", to_time="hours")
        (4.5, 'TB/hours')
        >>> bandwidth_converter(10, from_unit="GB", to_unit="Gbps")
        (80.0, 'Gbps/seconds')
        >>> Convert 2.25 GB per hours to Mbps # doctest: +SKIP
        >>> bandwidth_converter(2.25, from_unit="GB", from_time="hours", to_unit="Mbps", to_time="seconds") # noqa
        (5.0, 'Mbps/seconds')

    bytes2human(size, *, unit='', precision=2, base=1024)
        Convert number in bytes to human format.

        Arguments:
            size       (int): bytes to be converted

        Keyword arguments (opt):
            unit       (str): If it will convert bytes to a specific unit
                              'KB', 'MB', 'GB', 'TB', 'PB', 'EB'
            precision  (int): number of digits after the decimal point
            base       (int): 1000 - for decimal base
                              1024 - for binary base (it is the default)

        Returns:
            (int): number
            (str): unit ('Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB']

        Example:
        >>> bytes2human(10)
        ('10.00', 'Bytes')
        >>> bytes2human(2048)
        ('2.00', 'KB')
        >>> bytes2human(27273042329)
        ('25.40', 'GB')
        >>> bytes2human(27273042329, precision=1)
        ('25.4', 'GB')
        >>> bytes2human(27273042329, unit='MB')
        ('26009.60', 'MB')

    human2bytes(size, unit, *, precision=2, base=1024)
        Convert size from human to bytes.

        Arguments:
            size       (int): number
            unit       (str): converts from this unit to bytes
                              'KB', 'MB', 'GB', 'TB', 'PB', 'EB'

        Keyword arguments (opt):
            precision  (int): number of digits after the decimal point
                              default is 2
            base       (int): 1000 - for decimal base
                              1024 - for binary base (it is the default)

        Returns:
            (int) number in bytes

        Example:
        >>> human2bytes(10, 'GB')
        '10737418240.00'
        >>> human2bytes(10, 'GB', precision=0)
        '10737418240'
        >>> human2bytes(10, 'PB')
        '11258999068426240.00'
Help on module datetimefunc:

NAME
    datetimefunc - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Date and time functions

FUNCTIONS
    epoch_time_days_ago(days=1, *, utc='no')
        Return current date and time with less x days in unix epoch time format.

        Unix epoch time -  number of seconds that have elapsed since
                           00:00:00 Coordinated Universal Time (UTC),
                           1 January 1970

        Arguments (opt):
            days         (int): Number of days ago to return unix timestamp
                                default is 1 day

        Keyword arguments (opt):
            utc       (yes/no): If unix epoch time in UTC timezone
                                default is no
        Example:
        >>> epoch_time_days_ago() # doctest: +SKIP
        1530239517
        >>> epoch_time_days_ago(7) # doctest: +SKIP
        1529721118

    epoch_time_hours_ago(hours=1, *, utc='no')
        Return current date and time with less x hours in unix epoch time format.

        Unix epoch time -  number of seconds that have elapsed since
                           00:00:00 Coordinated Universal Time (UTC),
                           1 January 1970

        Arguments (opt):
            hours        (int): Number of hours ago to return unix timestamp
                                default is 1 hour

        Keyword arguments (opt):
            utc       (yes/no): If unix epoch time in UTC timezone
                                default is no
        Example:
        >>> epoch_time_hours_ago() # doctest: +SKIP
        1530322279
        >>> epoch_time_hours_ago(8) # doctest: +SKIP
        1530297083

    epoch_time_min_ago(minutes=5, *, utc='no')
        Return current date and time less x minutes in unix epoch time format.

        Unix epoch time -  number of seconds that have elapsed since
                           00:00:00 Coordinated Universal Time (UTC),
                           1 January 1970

        Arguments (opt):
            minutes        (int): Number of minutes ago to return unix timestamp
                            default is 5 minutes

        Keyword arguments (opt):
            utc         (yes/no): If unix epoch time in UTC timezone
                                  default is no
        Example:
        >>> epoch_time_min_ago() # doctest: +SKIP
        1530325377
        >>> epoch_time_min_ago(30) # doctest: +SKIP
        1530323879

    epoch_time_now(*, utc='no')
        Return current date and time in unix epoch time format.

        Unix epoch time -  number of seconds that have elapsed since
                           00:00:00 Coordinated Universal Time (UTC),
                           1 January 1970

        Arguments:
            utc         (yes/no): If returns unix epoch time in UTC timezone
                                  default is no
        Example:
        >>> epoch_time_now() # doctest: +SKIP
        1530325275

    epoch_time_to_human(epoch, *, date_format='%c', utc='no')
        Convert a unix epoch time to human format.

        Unix epoch time -  number of seconds that have elapsed since
                           00:00:00 Coordinated Universal Time (UTC),
                           1 January 1970

        Arguments:
            epoch          (int): unix epoch time (timestamp)

        Keyword arguments (opt):
            date_format    (str): strftime format to show the epoch time
                                  default is '%c' (Locales appropriate
                                  date and time representation)
            utc         (yes/no): If unix epoch time in UTC timezone
                                  default is no

        Example:
        >>> epoch_time_to_human(1530324373,date_format='%m%d%Y %H:%M:%S',utc='yes')
        '06302018 02:06:13'
        >>> epoch_time_to_human(1530324373) # doctest: +SKIP
        'Fri Jun 29 23:06:13 2018'
        >>> epoch_time_to_human(1530324373, utc='yes') # doctest: +SKIP
        'Sat Jun 30 02:06:13 2018'

    seconds_to_human(seconds, *, unit=None)
        Convert number in seconds to human format.

        Arguments:
            seconds      (int): Number of seconds

        Keyword arguments (opt):
            unit         (Months/Days/Hours/Minutes/Seconds):
                                Max unit used to convert

        Example:
        >>> seconds_to_human(300)
        '5 Minutes'
        >>> seconds_to_human(310)
        '5 Minutes, 10 Seconds'
        >>> seconds_to_human(10810)
        '3 Hours, 10 Seconds'
        >>> seconds_to_human(10810, unit='Minutes')
        '180 Minutes, 10 Seconds'
        >>> seconds_to_human(180072)
        '2 Days, 2 Hours, 1 Minutes, 12 Seconds'
        >>> seconds_to_human(5191272)
        '2 Months, 2 Hours, 1 Minutes, 12 Seconds'

    time_unit_conversion(number, *, from_unit, to_unit, precision=0, days_month=30, days_year=365)
        Convert number from a time unit to another time unit.

        Arguments:
            number             (int): number to convert

        Keyword arguments:
            from_unit    (seconds/minutes/hours/days/weeks/months/years):
                                      unit to convert from
            to_unit      (seconds/minutes/hours/days/weeks/months/years):
                                      unit to convert to

        Keyword arguments (opt):
            precision          (int): number of digits after the decimal point
                                      (default 0)
            days_month   (int/float): number of days in each month
                                      (default 30)
            days_year    (int/float): number of days in each year
                                      (default 365)

        Return:
            number converted to new unit

        Example:
        >>> time_unit_conversion(3600, from_unit="seconds", to_unit="hours")
        '1'
        >>> time_unit_conversion(1400, from_unit="minutes", to_unit="days")
        '1'
        >>> time_unit_conversion(36, from_unit="hours", to_unit="days", precision=1)
        '1.5'
        >>> time_unit_conversion(90, from_unit="days", to_unit="months")
        '3'
Help on module pct:

NAME
    pct - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Percentage Calculator

FUNCTIONS
    pct_change_from_x_to_y(number1, number2, *, precision='2')
        Calculate percent increase/decrease from number1 to number2.

        Arguments:
            number1    (int): start value (from)
            number2    (int): end value (to)

        Keyword arguments (opt):
            precision  (int): number of digits after the decimal point
                              default is 2

        Returns:
            (str):  number

        Example:
        >>> pct_change_from_x_to_y(100, 110)  # what is the pct increase from 100 to 110?
        '10.00%'
        >>> pct_change_from_x_to_y(100, 90)   # what is the pct from 100 to 90?
        '-10.00%'
        >>> pct_change_from_x_to_y(25, 50, precision=0)
        '100%'

    x_pct_of_number(pct, number, *, precision='2')
        Calculate what is the x% of a number.

        Arguments:
            pct        (int): percentage
            number     (int): number

        Keyword arguments (opt):
            precision  (int): number of digits after the decimal point
                              default is 2

        Returns:
            (str):  number

        Example:
        >>> x_pct_of_number(33.333, 90)     # what is 33.333% of 90?
        '30.00'
        >>> x_pct_of_number(40, 200)        # what is 40% of 200?
        '80.00'
        >>> x_pct_of_number(40.9, 200)      # what is 40.9% of 200?
        '81.80'
        >>> x_pct_of_number(40.9, 200, precision=4)
        '81.8000'
        >>> x_pct_of_number(40.9, 200, precision=0)
        '82'

    y_what_pct_of_x(number1, number2, *, precision='2')
        Calculate the percentage of number1 to number2.

        Number1 is what percent of number2.

        Arguments:
            number1     (int): number
            number2     (int): number

        Keyword arguments (opt):
            precision   (int): number of digits after the decimal point
                               default is 2

        Returns:
            (str):  Pct value

        Example:
        >>> y_what_pct_of_x(30, 90)    # 30 is what percent of 90?
        '33.33%'
        >>> y_what_pct_of_x(30, 90, precision=0)
        '33%'
        >>> y_what_pct_of_x(30, 90, precision=4)
        '33.3333%'
        >>> y_what_pct_of_x(10, 50, precision=0) # 10 is what percent of 50?
        '20%'
Help on module printtable:

NAME
    printtable - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Dependencies: prettytable

FUNCTIONS
    print_table(header, rows, *, sortby='', alignl='', alignr='', hrules='')
        Print table using module prettytable.

        Arguments:
            header     (list): List with table header
            rows       (list): Nested list with table rows
                               [ [row1], [row2], [row3], ... ]

        Keyword arguments (optional):
            sortby      (str): header name to sort the output
            alignl     (list): headers name to align to left
            alignr     (list): headers name to align to right
            hrules      (str): Controls printing of horizontal rules after rows.
                               Allowed values: FRAME, HEADER, ALL, NONE

        Example:
        >>> header = ["col1", "col2"]
        >>> rows = [ ["line1_col1", "line1_col2"], ["line2_col1", "line2_col2"] ]
        >>> print_table(header, rows)
        +------------+------------+
        |    col1    |    col2    |
        +------------+------------+
        | line1_col1 | line1_col2 |
        | line2_col1 | line2_col2 |
        +------------+------------+
Help on module pytz:

NAME
    pytz - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Dependencies: pytz

FUNCTIONS
    convert_datetime_to_tz(*, date, date_fmt, from_tz='UTC', to_tz='America/Sao_Paulo')
        Convert a date to a specific timezone.

        Keyword arguments:

            date           (str): date to convert
            date_fmt       (str): format of the date to convert
            from_tz   (timezone): source timezone name (default: UTC)
            to_tz     (timezone): target timezone name (default: America/Sao_Paulo)

        Returns:
            datetime object with the target timezone defined.

        Example:
        # convert a date from utc to America/Sao_Paulo
        >>> convert_datetime_to_tz(date='2019-04-26T10:38:05Z', # doctest: +SKIP
                                   date_fmt="%Y-%m-%dT%H:%M:%SZ")
        datetime.datetime(2019, 4, 26, 7, 38, 5,
                          tzinfo=<DstTzInfo 'America/Sao_Paulo' -03-1 day,
                          21:00:00 STD>)

        # convert date from America/Sao_Paulo to America/Los_Angeles
        >>> convert_datetime_to_tz(date='2019-04-26T10:38:05Z', # doctest: +SKIP
                                   date_fmt="%Y-%m-%dT%H:%M:%SZ",
                                   from_tz="America/Sao_Paulo",
                                   to_tz="America/Los_Angeles")
        datetime.datetime(2019, 4, 26, 6, 38, 5, # doctest: +SKIP
                          tzinfo=<DstTzInfo 'America/Los_Angeles' PDT-1 day,
                          17:00:00 DST>)

        # Convert date from America/New_York to Asia/Dubai
        >>> convert_datetime_to_tz(date='2019-04-26T10:38:05Z', # doctest: +SKIP
                                   date_fmt="%Y-%m-%dT%H:%M:%SZ",
                                   from_tz="America/New_York",
                                   to_tz="Asia/Dubai")
        datetime.datetime(2019, 4, 26, 18, 38, 5,
                          tzinfo=<DstTzInfo 'Asia/Dubai' +04+4:00:00 STD>)
Help on module downloadfile:

NAME
    downloadfile - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Dependencies: requests

FUNCTIONS
    download_file(url, local_file, *, allow_redirects=True, decode=True)
        Download a file.

        Arguments:
            url                    (str): URL to download
            local_file             (str): Local filename to store the downloaded
                                          file

        Keyword arguments (opt):
            allow_redirects (True/False): Allow request to redirect url
                                          default: True
            decode          (True/False): Decode compressed responses like gzip
                                          default: True

        Return:
            Request response headers

        Example:
        >>> download_file("http://google.com/favicon.ico", # doctest: +SKIP
                          "/tmp/google.ico")
Help on module decorators:

NAME
    decorators - Python Collection Of Functions.

DESCRIPTION
    Package with collection of small useful functions.

    Decorators functions

FUNCTIONS
    debug(_func=None, *, loglevel='DEBUG', print_info=False)
        Show function parameters and return values.

        Decorator keyword arguments (optional):
            loglevel          (str):  log level used to show debug information.
                                      (default DEBUG)
            print_info (True/False):  print debug information.
                                      (default False)

        Example:
        @debug
        def my_func():
            print("my func")
            return True

        @debug(print_info=True)
        def my_other_func(my_param):
            print("my other func")

    num_calls(_func=None, *, loglevel='DEBUG', print_info=False)
        Count the number of times a function is called.

        Decorator keyword arguments (optional):
            loglevel          (str):  log level used to show the number of
                                      calls information. (default DEBUG)
            print_info (True/False):  print function number of call information
                                      (default False)

        Example:
        @num_calls
        def my_func():
            print("my func")

        @num_calls(print_info=True)
        def my_other_func():
            print("my other func")

    retry_on_exception(_func=None, *, exception=(<class 'Exception'>,), loglevel='DEBUG', max_retry=5, sleep_retry=1, exception_error=None)
        Retry function execution if exception raises.

        Decorator keyword arguments (optional):
            exception            (tuple): Tuple with exceptions that decorator will retry
                                          function's execution
                                          (default any exception)
            loglevel               (str): Log level used to show debug information.
                                          (default DEBUG)
            max_retry              (int): Max number of retries. -1 to retry forever
                                          (default 5)
            sleep_retry            (int): Time in seconds to wait between retries
                                          (default 1)
            exception_error  (exception): Exception that decorator will raise if
                                          max_retry is reached without success
                                          (default the same exception function raises)

        Example:
        # Retry function if any exception raise
        @retry_on_exception
        def my_func():
            print("my func")
            raise (TimeoutError)

        # Retry only with exceptions: TimeoutErrorr, IndexError and Retry max of 10 times
        @retry_on_exception(exception=(TimeoutError, IndexError), max_retry=10)
        def my_other_func(my_param):
            print("my other func")

    time_elapsed(_func=None, *, loglevel='DEBUG', print_info=False)
        Calculate elapsed time in seconds.

        Decorator keyword arguments (optional):
            loglevel          (str):  log level used to show elapsed time
                                      (default DEBUG)
            print_info (True/False):  print elapsed time (default False)

        Example:
        @time_elapsed
        def my_func():
            print("my func")

        @time_elapsed(print_info=True)
        def my_other_func():
            print("my other func")