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"""
My Python startup file, carefully gathered from different sources (see below)
Get code from Github::
git clone https://github.com/jezdez/python-startup.git ~/.python
Put this in your shell profile::
export PYTHONSTARTUP=$HOME/.python/startup.py
In case you haven't saved these files in $HOME/.python make sure to set
PYTHONUSERDIR approppriately, too::
export PYTHONUSERDIR=/path/to/dir
"""
# python-startup.py
# Author: Nathan Gray, based on interactive.py by Robin Friedrich and an
# evil innate desire to customize things.
# E-Mail: n8gray@caltech.edu
#
# Version: 0.6
# These modules are always nice to have in the namespace
############################################################################
# Below this is Robin Friedrich's interactive.py with some edits to decrease
# namespace pollution and change the help functionality
# NG
#
# Also enhanced 'which' to return filename/lineno
# Patch from Stephan Fiedler to allow multiple args to ls variants
# NG 10/21/01 -- Corrected a bug in _glob
#
########################### interactive.py ###########################
# """Functions for doing shellish things in Python interactive mode.
#
# Meant to be imported at startup via environment:
# setenv PYTHONSTARTUP $HOME/easy.py
# or
# export PYTHONSTARTUP=$HOME/easy.py
#
# - Robin Friedrich
# """
import functools
import glob
import os
import shutil
import subprocess
import sys
import time
import types
try:
from pydoc import help
except ImportError:
def help(*objects):
"""Print doc strings for object(s).
Usage: >>> help(object, [obj2, objN]) (brackets mean [optional] argument)
"""
if len(objects) == 0:
help(help)
return
for obj in objects:
try:
print '****', obj.__name__ , '****'
print obj.__doc__
except AttributeError:
print `obj`, 'has no __doc__ attribute'
print
try:
from collections import defaultdict
except ImportError:
pass
home = os.path.expandvars('$HOME')
user_dir = os.path.join(home, os.environ.get("PYTHONUSERDIR", ".python"))
sys.path.append(user_dir)
##### Some settings you may want to change #####
# Define the editor used by the edit() function. Try to use the editor
# defined in the Unix environment, or default to vi if not set.
# (patch due to Stephan Fiedler)
#
# %(lineno)s gets replaced by the line number. Ditto %(fname)s the filename
EDITOR = os.environ.get('EDITOR', 'emacs')
editorbase = EDITOR.split()[0]
if editorbase in ['nedit', 'nc', 'ncl', 'emacs', 'emacsclient', 'xemacs'] :
# We know these editors supoprt a linenumber argument
EDITOR = EDITOR + ' +%(lineno)s %(fname)s &'
elif editorbase in ['vi', 'vim', 'jed']:
# Don't want to run vi in the background!
# If your editor requires a terminal (e.g. joe) use this as a template
EDITOR = 'xterm -e ' + EDITOR + ' +%(lineno)s %(fname)s &'
else:
# Guess that the editor only supports the filename
EDITOR = EDITOR + ' %(fname)s &'
del editorbase
# The place to store your command history between sessions
histfile = os.path.join(user_dir, "history")
# Functions automatically added to the builtins namespace so that you can
# use them in the debugger and other unusual environments
autobuiltins = ['edit', 'which', 'ls', 'cd', 'mv', 'cp', 'rm', 'help', 'rmdir',
'ln', 'pwd', 'pushd', 'popd', 'env', 'mkdir']
##### Now set up the interactive features that I like #####
# Colorize the prompts if possible (This is probably non-portable muck)
# Thanks to Stephan Fiedler for the fix!
if os.environ[ 'TERM' ] in [ 'xterm', 'vt100' ]:
pre = chr(1) + "\033[1;32m" + chr(2) # Turn the text green
suf = chr(1) + "\033[0m" + chr(2) # Reset to normal
sys.ps1 = pre + ">>>" + suf + " "
sys.ps2 = pre + "..." + suf + " "
del pre, suf
try:
# Set up colorized tracebacks
# Make sure to do this *before* installing LazyPython
import ultraTB
sys.excepthook = ultraTB.ColorTB()
except ImportError:
pass
# LazyPython only works for Python versions 2.1 and above
try:
# Try to use LazyPython
from LazyPython import LazyPython
sys.excepthook = LazyPython()
except ImportError:
pass
# Pretty-print at the command prompt for more readable dicts and lists.
from pprint import pprint
import __builtin__
def myhook(value, show=pprint, bltin=__builtin__):
if value is not None:
bltin._ = value
show(value)
sys.displayhook = myhook
del __builtin__
try:
# Try to set up command history completion/saving/reloading
import readline, atexit, rlcompleter
readline.parse_and_bind('tab: complete')
try:
readline.read_history_file(histfile)
except IOError:
pass # It doesn't exist yet.
def savehist():
try:
global histfile
readline.write_history_file(histfile)
except:
print 'Unable to save Python command history'
atexit.register(savehist)
del atexit
except ImportError:
pass
##### Make reload work recursively #####
try:
import __builtin__, deep_reload
__builtin__.reload = deep_reload.reload
del __builtin__, deep_reload
except ImportError:
pass
# Make an "edit" command that sends you to the right file *and line number*
# to edit a module, class, method, or function!
# Note that this relies on my enhanced version of which().
def edit(object, editor=EDITOR):
"""Edit the source file from which a module, class, method, or function
was imported.
Usage: >>> edit(mysteryObject)
"""
if type(object) is type(""):
fname = object; lineno = 1
print editor % locals()
subprocess.Popen(editor % locals(), shell=True)
return
ret = which(object)
if not ret:
print "Can't edit that!"
return
fname, lineno = ret
if fname[-4:] == '.pyc' or fname[-4:] == '.pyo':
fname = fname[:-1]
print editor % locals()
subprocess.Popen(editor % locals(), shell=True)
def timed(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
start = time.time()
res = func(*args, **kwargs)
end = time.time()
print("%s time: %.5f" % (func.__name__, end - start))
return res
return wrapper
def reimport(mod, locals=None):
if isinstance(mod, str):
modname = mod
else:
modname = mod.__name__
sys.modules[modname] = None
del sys.modules[modname]
new_mod = __import__(modname)
if locals is not None:
locals[modname] = new_mod
return new_mod
def _glob(filenames):
"""Expand a filename or sequence of filenames with possible
shell metacharacters to a list of valid filenames.
Ex: _glob(('*.py*',)) == ['able.py','baker.py','charlie.py']
"""
if type(filenames) is types.StringType:
return glob.glob(filenames)
flist = []
for filename in filenames:
globbed = glob.glob(filename)
if globbed:
for file in globbed:
flist.append(file)
else:
flist.append(filename)
return flist
def _expandpath(d):
"""Convert a relative path to an absolute path.
"""
return os.path.join(os.getcwd(), os.path.expandvars(d))
def _ls(options, *files):
"""
_ls(options, ['fname', ...'])
Lists the given filenames, or the current directory if none are
given, with the given options, which should be a string like '-lF'.
"""
if len(files) == 0 :
args = os.curdir
else :
args = ' '.join(files)
subprocess.Popen('ls %s %s' % (options, args), shell=True)
def ls(*files):
"""Same as 'ls -aF'
Usage: >>> ls(['dirname', ...]) (brackets mean [optional]
argument)
"""
_ls('-aF', *files)
def ll(*files):
"""Same as 'ls -alF'
Usage: >>> ll(['dirname', ...]) (brackets mean [optional]
argument)
"""
_ls('-alF', *files)
def lr(*files):
"""Recursive listing. same as 'ls -aRF'
Usage: >>> lr(['dirname', ...]) (brackets mean [optional]
argument)
"""
_ls('-aRF', *files)
mkdir = os.mkdir
def rm(*args):
"""Delete a file or files.
Usage: >>> rm('file.c' [, 'file.h']) (brackets mean [optional] argument)
Alias: delete
"""
filenames = _glob(args)
for item in filenames:
try:
os.remove(item)
except os.error, detail:
print "%s: %s" % (detail[1], item)
delete = rm
def rmdir(directory):
"""Remove a directory.
Usage: >>> rmdir('dirname')
If the directory isn't empty, can recursively delete all sub-files.
"""
try:
os.rmdir(directory)
except os.error:
#directory wasn't empty
answer = raw_input(directory+" isn't empty. Delete anyway?[n] ")
if answer and answer[0] in 'Yy':
subprocess.Popen('rm -rf %s' % directory, shell=True)
print directory + ' Deleted.'
else:
print directory + ' Unharmed.'
def mv(*args):
"""Move files within a filesystem.
Usage: >>> mv('file1', ['fileN',] 'fileordir')
If two arguments - both must be files
If more arguments - last argument must be a directory
"""
filenames = _glob(args)
nfilenames = len(filenames)
if nfilenames < 2:
print 'Need at least two arguments'
elif nfilenames == 2:
try:
os.rename(filenames[0], filenames[1])
except os.error, detail:
print "%s: %s" % (detail[1], filenames[1])
else:
for filename in filenames[:-1]:
try:
dest = filenames[-1]+'/'+filename
if not os.path.isdir(filenames[-1]):
print 'Last argument needs to be a directory'
return
os.rename(filename, dest)
except os.error, detail:
print "%s: %s" % (detail[1], filename)
def cp(*args):
"""Copy files along with their mode bits.
Usage: >>> cp('file1', ['fileN',] 'fileordir')
If two arguments - both must be files
If more arguments - last argument must be a directory
"""
filenames = _glob(args)
nfilenames = len(filenames)
if nfilenames < 2:
print 'Need at least two arguments'
elif nfilenames == 2:
try:
shutil.copy(filenames[0], filenames[1])
except os.error, detail:
print "%s: %s" % (detail[1], filenames[1])
else:
for filename in filenames[:-1]:
try:
dest = filenames[-1]+'/'+filename
if not os.path.isdir(filenames[-1]):
print 'Last argument needs to be a directory'
return
shutil.copy(filename, dest)
except os.error, detail:
print "%s: %s" % (detail[1], filename)
def cpr(src, dst):
"""Recursively copy a directory tree to a new location
Usage: >>> cpr('directory0', 'newdirectory')
Symbolic links are copied as links not source files.
"""
shutil.copytree(src, dst)
def ln(src, dst):
"""Create a symbolic link.
Usage: >>> ln('existingfile', 'newlink')
"""
os.symlink(src, dst)
def lnh(src, dst):
"""Create a hard file system link.
Usage: >>> ln('existingfile', 'newlink')
"""
os.link(src, dst)
def pwd():
"""Print current working directory path.
Usage: >>> pwd()
"""
print os.getcwd()
cdlist = [home]
def cd(directory = -1):
"""Change directory. Environment variables are expanded.
Usage:
cd('rel/$work/dir') change to a directory relative to your own
cd('/abs/path') change to an absolute directory path
cd() list directories you've been in
cd(int) integer from cd() listing, jump to that directory
"""
global cdlist
if type(directory) is types.IntType:
if directory in range(len(cdlist)):
cd(cdlist[directory])
return
else:
pprint(cdlist)
return
directory = _glob(directory)[0]
if not os.path.isdir(directory):
print `directory`+' is not a directory'
return
directory = _expandpath(directory)
if directory not in cdlist:
cdlist.append(directory)
os.chdir(directory)
def env():
"""List environment variables.
Usage: >>> env()
"""
#unfortunately environ is an instance not a dictionary
envdict = {}
for key, value in os.environ.items():
envdict[key] = value
pprint(envdict)
interactive_dir_stack = []
def pushd(directory=home):
"""Place the current dir on stack and change directory.
Usage: >>> pushd(['dirname']) (brackets mean [optional] argument)
pushd() goes home.
"""
global interactive_dir_stack
interactive_dir_stack.append(os.getcwd())
cd(directory)
def popd():
"""Change to directory popped off the top of the stack.
Usage: >>> popd()
"""
global interactive_dir_stack
try:
cd(interactive_dir_stack[-1])
print interactive_dir_stack[-1]
del interactive_dir_stack[-1]
except IndexError:
print 'Stack is empty'
def syspath():
"""Print the Python path.
Usage: >>> syspath()
"""
import sys
pprint(sys.path)
def which(object):
"""Print the source file from which a module, class, function, or method
was imported.
Usage: >>> which(mysteryObject)
Returns: Tuple with (file_name, line_number) of source file, or None if
no source file exists
Alias: whence
"""
object_type = type(object)
if object_type is types.ModuleType:
if hasattr(object, '__file__'):
print 'Module from', object.__file__
return (object.__file__, 1)
else:
print 'Built-in module.'
elif object_type is types.ClassType:
if object.__module__ == '__main__':
print 'Built-in class or class loaded from $PYTHONSTARTUP'
else:
print 'Class', object.__name__, 'from', \
sys.modules[object.__module__].__file__
# Send you to the first line of the __init__ method
return (sys.modules[object.__module__].__file__,
object.__init__.im_func.func_code.co_firstlineno)
elif object_type in (types.BuiltinFunctionType, types.BuiltinMethodType):
print "Built-in or extension function/method."
elif object_type is types.FunctionType:
print 'Function from', object.func_code.co_filename
return (object.func_code.co_filename, object.func_code.co_firstlineno)
elif object_type is types.MethodType:
print 'Method of class', object.im_class.__name__, 'from',
fname = sys.modules[object.im_class.__module__].__file__
print fname
return (fname, object.im_func.func_code.co_firstlineno)
else:
print "argument is not a module or function."
return None
whence = which
# Automatically add some convenience functions to __builtin__
import __builtin__
for n in autobuiltins:
exec '__builtin__.__dict__["%s"] = %s' % (n,n) in globals()