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from argparse import ArgumentTypeError
import errno
import os
class Error(Exception):
"""Base class for exceptions in this module."""
pass
class InputError(Error):
"""Exception raised for errors in the input.
Attributes:
expr # input expression in which the error occurred
msg # explanation of the error
"""
def __init__(self, expr, msg):
self.expr = expr
self.msg = msg
def is_file(f):
try:
open(f, 'r') # return an open file handle
except IOError:
raise ArgumentTypeError("{0} does not exist".format(f))
return f
def mkdir_p(path):
try:
os.makedirs(path)
except OSError as exc: # Python >2.5
if exc.errno == errno.EEXIST and os.path.isdir(path):
pass
else:
raise
return path
def remove_extension(path):
return os.path.splitext(os.path.basename(path))[0]
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