def getargcount(iteratee, maxargs):
"""Return argument count of iteratee function."""
if hasattr(iteratee, "_argcount"):
# Optimization feature where argcount of iteratee is known and properly
# set by initator.
return iteratee._argcount
if isinstance(iteratee, type) or pyd.is_builtin(iteratee):
# Only pass single argument to type iteratees or builtins.
argcount = 1
else:
argcount = 1
try:
argcount = _getfullargspec(iteratee, maxargs)
except TypeError: # pragma: no cover
# PY2: Python2.7 throws a TypeError on classes that have __call__() defined but Python3
# doesn't. So if we fail with TypeError here, try iteratee as iteratee.__call__.
if PY2 and hasattr(iteratee, "__call__"): # noqa: B004
try:
argcount = _getfullargspec(iteratee.__call__, maxargs)
except TypeError:
pass
return argcount
def getargcount(iteratee, maxargs):
"""Return argument count of iteratee function."""
if hasattr(iteratee, '_argcount'):
# Optimization feature where argcount of iteratee is known and properly
# set by initator.
return iteratee._argcount
argspec = None
if isinstance(iteratee, type) or pyd.is_builtin(iteratee):
# Only pass single argument to type iteratees or builtins.
argcount = 1
else:
try:
argspec = getfullargspec(iteratee)
if argspec and not argspec.varargs:
# Use inspected arg count.
argcount = len(argspec.args)
else:
# Assume all args are handleable
argcount = maxargs
except TypeError: # pragma: no cover
argcount = 1
return argcount
def getargcount(iteratee, maxargs):
"""Return argument count of iteratee function."""
if hasattr(iteratee, '_argcount'):
# Optimization feature where argcount of iteratee is known and properly
# set by initator.
return iteratee._argcount
if isinstance(iteratee, type) or pyd.is_builtin(iteratee):
# Only pass single argument to type iteratees or builtins.
argcount = 1
else:
argcount = 1
try:
argcount = _getfullargspec(iteratee, maxargs)
except TypeError: # pragma: no cover
# PY2: Python2.7 throws a TypeError on classes that have __call__()
# defined but Python3 doesn't. So if we fail with TypeError here,
# try iteratee as iteratee.__call__.
if PY2 and hasattr(iteratee, '__call__'):
try:
argcount = _getfullargspec(iteratee.__call__, maxargs)
except TypeError:
pass
return argcount
def call_callback(callback, *args):
"""Inspect argspec of `callback` function and only pass the supported
arguments when calling it.
"""
maxargs = len(args)
argspec = None
try:
argspec = inspect.getargspec(callback)
except TypeError:
try:
argspec = inspect.getargspec(getattr(callback, "__call__", None))
except TypeError: # pragma: no cover
pass
finally:
if isinstance(callback, type):
# Only pass single argument to type callbacks. This is for things
# like int(), float(), str(), etc.
argcount = 1
elif pyd.is_builtin(callback):
argcount = guess_builtin_argcount(callback) or maxargs
elif argspec and argspec.varargs:
# Callback supports variable arguments.
argcount = maxargs
elif argspec:
# Use inspected arg count.
argcount = len(argspec.args)
else: # pragma: no cover
argcount = maxargs
argstop = min([maxargs, argcount])
return callback(*args[:argstop])
def call_callback(callback, *args):
"""Inspect argspec of `callback` function and only pass the supported
arguments when calling it.
"""
maxargs = len(args)
argspec = None
try:
argspec = inspect.getargspec(callback)
except TypeError:
try:
argspec = inspect.getargspec(getattr(callback, '__call__', None))
except TypeError: # pragma: no cover
pass
finally:
if isinstance(callback, type):
# Only pass single argument to type callbacks. This is for things
# like int(), float(), str(), etc.
argcount = 1
elif pyd.is_builtin(callback):
argcount = guess_builtin_argcount(callback) or maxargs
elif argspec and argspec.varargs:
# Callback supports variable arguments.
argcount = maxargs
elif argspec:
# Use inspected arg count.
argcount = len(argspec.args)
else: # pragma: no cover
argcount = maxargs
argstop = min([maxargs, argcount])
return callback(*args[:argstop])
def getargcount(callback, maxargs):
"""Return argument count of callback function."""
if hasattr(callback, '_argcount'):
# Optimization feature where argcount of callback is known and properly
# set by initator.
return callback._argcount
argspec = None
if isinstance(callback, type) or pyd.is_builtin(callback):
# Only pass single argument to type callbacks or builtins.
argcount = 1
else:
try:
argspec = inspect.getargspec(callback)
if argspec and not argspec.varargs:
# Use inspected arg count.
argcount = len(argspec.args)
else:
# Assume all args are handleable
argcount = maxargs
except TypeError: # pragma: no cover
argcount = 1
return argcount
def getargcount(iteratee, maxargs):
"""Return argument count of iteratee function."""
if hasattr(iteratee, "_argcount"):
# Optimization feature where argcount of iteratee is known and properly
# set by initator.
return iteratee._argcount
if isinstance(iteratee, type) or pyd.is_builtin(iteratee):
# Only pass single argument to type iteratees or builtins.
argcount = 1
else:
argcount = 1
try:
argcount = _getargcount(iteratee, maxargs)
except TypeError: # pragma: no cover
pass
return argcount
def test_is_builtin(case, expected):
assert _.is_builtin(case) == expected