def deduce_helpful_msg(req):
"""Returns helpful msg in case requirements file does not exist,
or cannot be parsed.
:params req: Requirements file path
"""
msg = ""
if os.path.exists(req):
msg = " It does exist."
# Try to parse and check if it is a requirements file.
try:
with open(req, 'r') as fp:
# parse first line only
next(parse_requirements(fp.read()))
msg += " The argument you provided " + \
"(%s) appears to be a" % (req) + \
" requirements file. If that is the" + \
" case, use the '-r' flag to install" + \
" the packages specified within it."
except RequirementParseError:
logger.debug("Cannot parse '%s' as requirements \
file" % (req), exc_info=1)
else:
msg += " File '%s' does not exist." % (req)
return msg
python类RequirementParseError()的实例源码
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
req_install.py 文件源码
项目：My-Web-Server-Framework-With-Python2.7
作者: syjsu
项目源码
文件源码
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def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
def __init__(self, req, comes_from, source_dir=None, editable=False,
link=None, as_egg=False, update=True,
pycompile=True, markers=None, isolated=False, options=None,
wheel_cache=None, constraint=False):
self.extras = ()
if isinstance(req, six.string_types):
try:
req = pkg_resources.Requirement.parse(req)
except pkg_resources.RequirementParseError:
if os.path.sep in req:
add_msg = "It looks like a path. Does it exist ?"
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
self.extras = req.extras
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.source_dir = source_dir
self.editable = editable
self._wheel_cache = wheel_cache
self.link = self.original_link = link
self.as_egg = as_egg
self.markers = markers
self._egg_info_path = None
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by = None
# This hold the pkg_resources.Distribution object if this requirement
# conflicts with another installed distribution:
self.conflicts_with = None
# Temporary build location
self._temp_build_dir = None
# Used to store the global directory where the _temp_build_dir should
# have been created. Cf _correct_build_location method.
self._ideal_build_dir = None
# True if the editable should be updated:
self.update = update
# Set to True after successful installation
self.install_succeeded = None
# UninstallPathSet of uninstalled distribution (for possible rollback)
self.uninstalled = None
# Set True if a legitimate do-nothing-on-uninstall has happened - e.g.
# system site packages, stdlib packages.
self.nothing_to_uninstall = False
self.use_user_site = False
self.target_dir = None
self.options = options if options else {}
self.pycompile = pycompile
# Set to True after successful preparation of this requirement
self.prepared = False
self.isolated = isolated
