diff --git a/.pylintrc b/.pylintrc
new file mode 100644
index 000000000..6311c4618
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1,582 @@
+[MASTER]
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code.
+extension-pkg-whitelist=
+
+# Add files or directories to the blacklist. They should be base names, not
+# paths.
+ignore=CVS
+
+# Add files or directories matching the regex patterns to the blacklist. The
+# regex matches against base names, not paths.
+ignore-patterns=
+
+# Python code to execute, usually for sys.path manipulation such as
+# pygtk.require().
+init-hook='import sys; sys.path.append(".")'
+
+# Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
+# number of processors available to use.
+jobs=1
+
+# Control the amount of potential inferred values when inferring a single
+# object. This can help the performance when dealing with large functions or
+# complex, nested conditions.
+limit-inference-results=100
+
+# List of plugins (as comma separated values of python module names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Pickle collected data for later comparisons.
+persistent=yes
+
+# Specify a configuration file.
+#rcfile=
+
+# When enabled, pylint would attempt to guess common misconfiguration and emit
+# user-friendly hints instead of false-positive error messages.
+suggestion-mode=yes
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED.
+confidence=
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once). You can also use "--disable=all" to
+# disable everything first and then reenable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use "--disable=all --enable=classes
+# --disable=W".
+disable=print-statement,
+        parameter-unpacking,
+        unpacking-in-except,
+        old-raise-syntax,
+        backtick,
+        long-suffix,
+        old-ne-operator,
+        old-octal-literal,
+        import-star-module-level,
+        non-ascii-bytes-literal,
+        raw-checker-failed,
+        bad-inline-option,
+        locally-disabled,
+        file-ignored,
+        suppressed-message,
+        useless-suppression,
+        deprecated-pragma,
+        use-symbolic-message-instead,
+        apply-builtin,
+        basestring-builtin,
+        buffer-builtin,
+        cmp-builtin,
+        coerce-builtin,
+        execfile-builtin,
+        file-builtin,
+        long-builtin,
+        raw_input-builtin,
+        reduce-builtin,
+        standarderror-builtin,
+        unicode-builtin,
+        xrange-builtin,
+        coerce-method,
+        delslice-method,
+        getslice-method,
+        setslice-method,
+        no-absolute-import,
+        old-division,
+        dict-iter-method,
+        dict-view-method,
+        next-method-called,
+        metaclass-assignment,
+        indexing-exception,
+        raising-string,
+        reload-builtin,
+        oct-method,
+        hex-method,
+        nonzero-method,
+        cmp-method,
+        input-builtin,
+        round-builtin,
+        intern-builtin,
+        unichr-builtin,
+        map-builtin-not-iterating,
+        zip-builtin-not-iterating,
+        range-builtin-not-iterating,
+        filter-builtin-not-iterating,
+        using-cmp-argument,
+        eq-without-hash,
+        div-method,
+        idiv-method,
+        rdiv-method,
+        exception-message-attribute,
+        invalid-str-codec,
+        sys-max-int,
+        bad-python3-import,
+        deprecated-string-function,
+        deprecated-str-translate-call,
+        deprecated-itertools-function,
+        deprecated-types-field,
+        next-method-defined,
+        dict-items-not-iterating,
+        dict-keys-not-iterating,
+        dict-values-not-iterating,
+        deprecated-operator-function,
+        deprecated-urllib-function,
+        xreadlines-attribute,
+        deprecated-sys-function,
+        exception-escape,
+        comprehension-escape,
+        duplicate-code
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+enable=c-extension-no-member
+
+
+[REPORTS]
+
+# Python expression which should return a score less than or equal to 10. You
+# have access to the variables 'error', 'warning', 'refactor', and 'convention'
+# which contain the number of messages in each category, as well as 'statement'
+# which is the total number of statements analyzed. This score is used by the
+# global evaluation report (RP0004).
+evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
+
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details.
+#msg-template=
+
+# Set the output format. Available formats are text, parseable, colorized, json
+# and msvs (visual studio). You can also give a reporter class, e.g.
+# mypackage.mymodule.MyReporterClass.
+output-format=text
+
+# Tells whether to display a full report or only the messages.
+reports=no
+
+# Activate the evaluation score.
+score=yes
+
+
+[REFACTORING]
+
+# Maximum number of nested blocks for function / method body
+max-nested-blocks=5
+
+# Complete name of functions that never returns. When checking for
+# inconsistent-return-statements if a never returning function is called then
+# it will be considered as an explicit return statement and no message will be
+# printed.
+never-returning-functions=sys.exit
+
+
+[LOGGING]
+
+# Format style used to check logging format string. `old` means using %
+# formatting, `new` is for `{}` formatting,and `fstr` is for f-strings.
+logging-format-style=old
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format.
+logging-modules=logging
+
+
+[SPELLING]
+
+# Limits count of emitted suggestions for spelling mistakes.
+max-spelling-suggestions=4
+
+# Spelling dictionary name. Available dictionaries: none. To make it work,
+# install the python-enchant package.
+spelling-dict=
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains the private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to the private dictionary (see the
+# --spelling-private-dict-file option) instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=FIXME,
+      XXX,
+      TODO
+
+
+[TYPECHECK]
+
+# List of decorators that produce context managers, such as
+# contextlib.contextmanager. Add to this list to register other decorators that
+# produce valid context managers.
+contextmanager-decorators=contextlib.contextmanager
+
+# List of members which are set dynamically and missed by pylint inference
+# system, and so shouldn't trigger E1101 when accessed. Python regular
+# expressions are accepted.
+generated-members=
+
+# Tells whether missing members accessed in mixin class should be ignored. A
+# mixin class is detected if its name ends with "mixin" (case insensitive).
+ignore-mixin-members=yes
+
+# Tells whether to warn about missing members when the owner of the attribute
+# is inferred to be None.
+ignore-none=yes
+
+# This flag controls whether pylint should warn about no-member and similar
+# checks whenever an opaque object is returned when inferring. The inference
+# can return multiple potential results while evaluating a Python object, but
+# some branches might not be evaluated, which results in partial inference. In
+# that case, it might be useful to still emit no-member and other checks for
+# the rest of the inferred objects.
+ignore-on-opaque-inference=yes
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=optparse.Values,thread._local,_thread._local
+
+# List of module names for which member attributes should not be checked
+# (useful for modules/projects where namespaces are manipulated during runtime
+# and thus existing member attributes cannot be deduced by static analysis). It
+# supports qualified module names, as well as Unix pattern matching.
+ignored-modules=
+
+# Show a hint with possible names when a member name was not found. The aspect
+# of finding the hint is based on edit distance.
+missing-member-hint=yes
+
+# The minimum edit distance a name should have in order to be considered a
+# similar match for a missing member name.
+missing-member-hint-distance=1
+
+# The total number of similar names that should be taken in consideration when
+# showing a hint for a missing member.
+missing-member-max-choices=1
+
+# List of decorators that change the signature of a decorated function.
+signature-mutators=
+
+
+[VARIABLES]
+
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid defining new builtins when possible.
+additional-builtins=
+
+# Tells whether unused global variables should be treated as a violation.
+allow-global-unused-variables=yes
+
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,
+          _cb
+
+# A regular expression matching the name of dummy variables (i.e. expected to
+# not be used).
+dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
+
+# Argument names that match this expression will be ignored. Default to name
+# with leading underscore.
+ignored-argument-names=_.*|^ignored_|^unused_
+
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
+
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six.moves,past.builtins,future.builtins,builtins,io
+
+
+[FORMAT]
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
+
+# Number of spaces of indent required inside a hanging or continued line.
+indent-after-paren=4
+
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
+
+# Maximum number of characters on a single line.
+max-line-length=100
+
+# Maximum number of lines in a module.
+max-module-lines=1000
+
+# List of optional constructs for which whitespace checking is disabled. `dict-
+# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
+# `trailing-comma` allows a space between comma and closing bracket: (a, ).
+# `empty-line` allows space-only lines.
+no-space-check=trailing-comma,
+               dict-separator
+
+# Allow the body of a class to be on the same line as the declaration if body
+# contains single statement.
+single-line-class-stmt=no
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
+
+
+[SIMILARITIES]
+
+# Ignore comments when computing similarities.
+ignore-comments=yes
+
+# Ignore docstrings when computing similarities.
+ignore-docstrings=yes
+
+# Ignore imports when computing similarities.
+ignore-imports=no
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+
+[BASIC]
+
+# Naming style matching correct argument names.
+argument-naming-style=snake_case
+
+# Regular expression matching correct argument names. Overrides argument-
+# naming-style.
+#argument-rgx=
+
+# Naming style matching correct attribute names.
+attr-naming-style=snake_case
+
+# Regular expression matching correct attribute names. Overrides attr-naming-
+# style.
+#attr-rgx=
+
+# Bad variable names which should always be refused, separated by a comma.
+bad-names=foo,
+          bar,
+          baz,
+          toto,
+          tutu,
+          tata
+
+# Naming style matching correct class attribute names.
+class-attribute-naming-style=any
+
+# Regular expression matching correct class attribute names. Overrides class-
+# attribute-naming-style.
+#class-attribute-rgx=
+
+# Naming style matching correct class names.
+class-naming-style=PascalCase
+
+# Regular expression matching correct class names. Overrides class-naming-
+# style.
+#class-rgx=
+
+# Naming style matching correct constant names.
+const-naming-style=UPPER_CASE
+
+# Regular expression matching correct constant names. Overrides const-naming-
+# style.
+#const-rgx=
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+# Naming style matching correct function names.
+function-naming-style=snake_case
+
+# Regular expression matching correct function names. Overrides function-
+# naming-style.
+#function-rgx=
+
+# Good variable names which should always be accepted, separated by a comma.
+good-names=i,
+           j,
+           k,
+           ex,
+           Run,
+           _
+
+# Include a hint for the correct naming format with invalid-name.
+include-naming-hint=no
+
+# Naming style matching correct inline iteration names.
+inlinevar-naming-style=any
+
+# Regular expression matching correct inline iteration names. Overrides
+# inlinevar-naming-style.
+#inlinevar-rgx=
+
+# Naming style matching correct method names.
+method-naming-style=snake_case
+
+# Regular expression matching correct method names. Overrides method-naming-
+# style.
+#method-rgx=
+
+# Naming style matching correct module names.
+module-naming-style=snake_case
+
+# Regular expression matching correct module names. Overrides module-naming-
+# style.
+#module-rgx=
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=^_
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+# These decorators are taken in consideration only for invalid-name.
+property-classes=abc.abstractproperty
+
+# Naming style matching correct variable names.
+variable-naming-style=snake_case
+
+# Regular expression matching correct variable names. Overrides variable-
+# naming-style.
+#variable-rgx=
+
+
+[STRING]
+
+# This flag controls whether the implicit-str-concat-in-sequence should
+# generate a warning on implicit string concatenation in sequences defined over
+# several lines.
+check-str-concat-over-line-jumps=no
+
+
+[IMPORTS]
+
+# List of modules that can be imported at any level, not just the top level
+# one.
+allow-any-import-level=
+
+# Allow wildcard imports from modules that define __all__.
+allow-wildcard-with-all=no
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+# Deprecated modules which should not be used, separated by a comma.
+deprecated-modules=optparse,tkinter.tix
+
+# Create a graph of external dependencies in the given file (report RP0402 must
+# not be disabled).
+ext-import-graph=
+
+# Create a graph of every (i.e. internal and external) dependencies in the
+# given file (report RP0402 must not be disabled).
+import-graph=
+
+# Create a graph of internal dependencies in the given file (report RP0402 must
+# not be disabled).
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant
+
+# Couples of modules and preferred modules, separated by a comma.
+preferred-modules=
+
+
+[CLASSES]
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,
+                      __new__,
+                      setUp,
+                      __post_init__
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,
+                  _fields,
+                  _replace,
+                  _source,
+                  _make
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=cls
+
+
+[DESIGN]
+
+# Maximum number of arguments for function / method.
+max-args=5
+
+# Maximum number of attributes for a class (see R0902).
+max-attributes=7
+
+# Maximum number of boolean expressions in an if statement (see R0916).
+max-bool-expr=5
+
+# Maximum number of branch for function / method body.
+max-branches=12
+
+# Maximum number of locals for function / method body.
+max-locals=15
+
+# Maximum number of parents for a class (see R0901).
+max-parents=7
+
+# Maximum number of public methods for a class (see R0904).
+max-public-methods=20
+
+# Maximum number of return / yield for function / method body.
+max-returns=6
+
+# Maximum number of statements in function / method body.
+max-statements=50
+
+# Minimum number of public methods for a class (see R0903).
+min-public-methods=2
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when being caught. Defaults to
+# "BaseException, Exception".
+overgeneral-exceptions=BaseException,
+                       Exception
diff --git a/.travis.yml b/.travis.yml
index c1872c22e..336526dda 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -106,3 +106,19 @@ jobs:
       env:
         - DOCKER_IMAGE=continuumio/anaconda3:2020.02
         - NOTEBOOK_PATH=recipes/getting-started/getting_started-image_classification.ipynb
+    - &test-pylint
+      stage: Test *.py with pylint
+      script:
+        - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+        - docker pull ${DOCKER_IMAGE}
+        - |
+          docker run \
+            ${DOCKER_IMAGE} /bin/sh -c "cd /root && \
+              apt-get update && apt-get install -y gcc && \
+              git clone --branch ${TRAVIS_BRANCH} https://github.com/kili-technology/kili-playground.git && \
+              pip install pylint && \
+              cd kili-playground && \
+              pip install -r requirements.txt && \
+              pylint kili"
+      env:
+        - DOCKER_IMAGE=continuumio/anaconda3:2020.02
diff --git a/kili/graphql_client.py b/kili/graphql_client.py
index 63d62d1e4..0e501a39b 100644
--- a/kili/graphql_client.py
+++ b/kili/graphql_client.py
@@ -80,15 +80,15 @@ def _send(self, query, variables):
                 return req.json()
             except Exception as exception:
                 if req is not None:
-                    raise Exception(req.content)
+                    raise Exception(req.content) from exception
                 raise exception
 
         req = urllib.request.Request(
             self.endpoint, json.dumps(data).encode('utf-8'), headers)
         try:
-            response = urllib.request.urlopen(req)
-            str_json = response.read().decode('utf-8')
-            return json.loads(str_json)
+            with urllib.request.urlopen(req) as response:
+                str_json = response.read().decode('utf-8')
+                return json.loads(str_json)
         except urllib.error.HTTPError as error:
             print((error.read()))
             print('')
diff --git a/kili/helpers.py b/kili/helpers.py
index 3c38545b7..183bb4e87 100644
--- a/kili/helpers.py
+++ b/kili/helpers.py
@@ -44,10 +44,10 @@ def __call__(self, resolver, *args, **kwargs):
         def checked_resolver(*args, **kwargs):
             try:
                 client_endpoint = args[0].auth.client.endpoint
-            except:
+            except Exception as exception:
                 raise ValueError(
                     'Cannot find client endpoint from resolver' \
-                    f' {resolver.__name__} with arguments {args}')
+                    f' {resolver.__name__} with arguments {args}') from exception
             if self.client_is_compatible(client_endpoint):
                 return resolver(*args, **kwargs)
             raise EndpointCompatibilityError(
@@ -154,17 +154,17 @@ def format_json_dict(result):
         if key in ['jsonInterface', 'jsonMetadata', 'jsonResponse', 'rules']:
             if (value == '' or value is None) \
                     and not (is_url(value) and key == 'jsonInterface'):
-                result[key] = dict()
+                result[key] = {}
             elif isinstance(value, str):
                 try:
                     if is_url(value):
                         result[key] = requests.get(value).json()
                     else:
                         result[key] = loads(value)
-                except:
+                except Exception as exception:
                     raise ValueError(
                         'Json Metadata / json response /' \
-                        ' json interface / rules should be valid jsons')
+                        ' json interface / rules should be valid jsons') from exception
         else:
             result[key] = format_json(value)
     return result
diff --git a/kili/mutations/asset/__init__.py b/kili/mutations/asset/__init__.py
index b19ab0786..e42245c43 100644
--- a/kili/mutations/asset/__init__.py
+++ b/kili/mutations/asset/__init__.py
@@ -112,7 +112,7 @@ def append_many_to_dataset(
 
         if content_array is None and json_content_array is None:
             raise ValueError(
-                f"Variables content_array and json_content_array cannot be both None.")
+                "Variables content_array and json_content_array cannot be both None.")
         if content_array is None:
             content_array = [''] * len(json_content_array)
         if external_id_array is None:
diff --git a/kili/mutations/project/queries.py b/kili/mutations/project/queries.py
index a6bf4e060..a44529e8d 100644
--- a/kili/mutations/project/queries.py
+++ b/kili/mutations/project/queries.py
@@ -78,7 +78,7 @@
 }}
 '''
 
-GQL_MAKE_PROJECT_PUBLIC = f'''
+GQL_MAKE_PROJECT_PUBLIC = '''
 mutation(
     $projectID: ID!
   ) {{
@@ -153,7 +153,7 @@
 }}
 '''
 
-GQL_PROJECT_DELETE_ASYNCHRONOUSLY = f'''
+GQL_PROJECT_DELETE_ASYNCHRONOUSLY = '''
 mutation($projectID: ID!) {{
   data: deleteProjectAsynchronously(where: {{
       id: $projectID
diff --git a/kili/orm.py b/kili/orm.py
index aba469843..ce423fa5b 100644
--- a/kili/orm.py
+++ b/kili/orm.py
@@ -10,7 +10,7 @@ class DictClass(dict):
     """
 
     def __init__(self, *args, **kwargs):
-        super(DictClass, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.__dict__ = self
 
 @dataclass
@@ -142,7 +142,7 @@ class Asset(DictClass):
     """
 
     def __init__(self, *args, **kwargs):
-        super(Asset, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         if 'labels' in self:
             labels = []
             for label in self['labels']:
diff --git a/kili/queries/asset/queries.py b/kili/queries/asset/queries.py
index 9246353c9..2c752a5da 100644
--- a/kili/queries/asset/queries.py
+++ b/kili/queries/asset/queries.py
@@ -14,7 +14,7 @@ def gql_assets(fragment):
 }}
 '''
 
-GQL_ASSETS_COUNT = f'''
+GQL_ASSETS_COUNT = '''
 query($where: AssetWhere!) {{
   data: countAssets(where: $where)
 }}
diff --git a/kili/queries/dataset_asset/queries.py b/kili/queries/dataset_asset/queries.py
index 84130ae2f..d050ad3a6 100644
--- a/kili/queries/dataset_asset/queries.py
+++ b/kili/queries/dataset_asset/queries.py
@@ -15,7 +15,7 @@ def gql_assets(fragment):
 '''
 
 
-GQL_DATASET_ASSETS_COUNT = f'''
+GQL_DATASET_ASSETS_COUNT = '''
 query($where: DatasetAssetWhere!) {{
   data: countDatasetAssets(where: $where)
 }}
diff --git a/kili/queries/issue/queries.py b/kili/queries/issue/queries.py
index cde5ac6ce..af1a69e7c 100644
--- a/kili/queries/issue/queries.py
+++ b/kili/queries/issue/queries.py
@@ -15,7 +15,7 @@ def gql_issues(fragment):
 '''
 
 
-GQL_LABELS_COUNT = f'''
+GQL_LABELS_COUNT = '''
 query($where: IssueWhere!) {{
   data: countIssues(where: $where)
 }}
diff --git a/kili/queries/label/queries.py b/kili/queries/label/queries.py
index a97593252..4cc6b30db 100644
--- a/kili/queries/label/queries.py
+++ b/kili/queries/label/queries.py
@@ -15,7 +15,7 @@ def gql_labels(fragment):
 '''
 
 
-GQL_LABELS_COUNT = f'''
+GQL_LABELS_COUNT = '''
 query($where: LabelWhere!) {{
   data: countLabels(where: $where)
 }}
diff --git a/kili/queries/lock/queries.py b/kili/queries/lock/queries.py
index 52be9bf35..c257ba96f 100644
--- a/kili/queries/lock/queries.py
+++ b/kili/queries/lock/queries.py
@@ -14,7 +14,7 @@ def gql_locks(fragment):
 }}
 '''
 
-GQL_LOCKS_COUNT = f'''
+GQL_LOCKS_COUNT = '''
 query($where: LockWhere!) {{
   data: countLocks(where: $where)
 }}
diff --git a/kili/queries/notification/queries.py b/kili/queries/notification/queries.py
index 7c6326f94..e7132812a 100644
--- a/kili/queries/notification/queries.py
+++ b/kili/queries/notification/queries.py
@@ -15,7 +15,7 @@ def gql_notifications(fragment):
 '''
 
 
-GQL_NOTIFICATIONS_COUNT = f'''
+GQL_NOTIFICATIONS_COUNT = '''
 query($where: NotificationWhere!) {{
   data: countNotifications(where: $where)
 }}
diff --git a/kili/queries/organization/queries.py b/kili/queries/organization/queries.py
index 2b5f65464..b4fe38446 100644
--- a/kili/queries/organization/queries.py
+++ b/kili/queries/organization/queries.py
@@ -14,7 +14,7 @@ def gql_organizations(fragment):
 }}
 '''
 
-GQL_ORGANIZATIONS_COUNT = f'''
+GQL_ORGANIZATIONS_COUNT = '''
 query($where: OrganizationWhere!) {{
   data: countOrganizations(where: $where)
 }}
diff --git a/kili/queries/project/queries.py b/kili/queries/project/queries.py
index df06e6215..d674eec3f 100644
--- a/kili/queries/project/queries.py
+++ b/kili/queries/project/queries.py
@@ -14,7 +14,7 @@ def gql_projects(fragment: str):
 }}
 '''
 
-GQL_PROJECTS_COUNT = f'''
+GQL_PROJECTS_COUNT = '''
 query($where: ProjectWhere!) {{
   data: countProjects(where: $where)
 }}
diff --git a/kili/queries/project_user/queries.py b/kili/queries/project_user/queries.py
index 0f51c6208..5564780f5 100644
--- a/kili/queries/project_user/queries.py
+++ b/kili/queries/project_user/queries.py
@@ -15,7 +15,7 @@ def gql_project_users(fragment):
 '''
 
 
-GQL_PROJECT_USERS_COUNT = f'''
+GQL_PROJECT_USERS_COUNT = '''
 query($where: ProjectUserWhere!) {{
   data: countProjectUsers(where: $where)
 }}
diff --git a/kili/queries/project_version/queries.py b/kili/queries/project_version/queries.py
index 8dea5d98c..b9f5da87b 100644
--- a/kili/queries/project_version/queries.py
+++ b/kili/queries/project_version/queries.py
@@ -15,7 +15,7 @@ def gql_project_version(fragment):
 '''
 
 
-GQL_PROJECT_VERSION_COUNT = f'''
+GQL_PROJECT_VERSION_COUNT = '''
 query($where: ProjectVersionWhere!) {{
   data: countProjectVersions(where: $where)
 }}
diff --git a/kili/queries/user/queries.py b/kili/queries/user/queries.py
index 4d3de4988..6c40fa9b6 100644
--- a/kili/queries/user/queries.py
+++ b/kili/queries/user/queries.py
@@ -15,7 +15,7 @@ def gql_users(fragment):
 '''
 
 
-GQL_USERS_COUNT = f'''
+GQL_USERS_COUNT = '''
 query($where: UserWhere!) {{
   data: countUsers(where: $where)
 }}
diff --git a/kili/transfer_learning.py b/kili/transfer_learning.py
index 9c947091c..6b1c84d87 100644
--- a/kili/transfer_learning.py
+++ b/kili/transfer_learning.py
@@ -88,9 +88,10 @@ def launch_train(self):
         if len(self.assets_seen_in_training) == 0:
             filtered_assets_to_train = assets_to_train
         else:
-            filtered_assets_to_train = [asset for asset in assets_to_train
-                                        if all([asset['id'] not in training
-                                                for training in self.assets_seen_in_training])]
+            filtered_assets_to_train = [
+                asset for asset in assets_to_train
+                    if all([asset['id'] not in training # pylint: disable=use-a-generator
+                        for training in self.assets_seen_in_training])]
         if len(filtered_assets_to_train) >= self.minimum_number_of_assets_to_launch_training:
             TransferLearning.train(filtered_assets_to_train)
             self.current_training_number += 1
@@ -139,8 +140,8 @@ def launch_tensorboard():
         Launches the tensorboard
         """
         print('Starting Tensorboard...')
-        subprocess.Popen(['tensorboard', '--logdir=runs'])
-        print('You can access Tensorboard at http://localhost:6006\n')
+        with subprocess.Popen(['tensorboard', '--logdir=runs']):
+            print('You can access Tensorboard at http://localhost:6006\n')
 
     def launch(self):
         """
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..d8dc11bd3
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+pandas==1.2.5
+requests
+six
+tqdm
+typeguard
+websocket-client
\ No newline at end of file