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23502p3.py
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27 lines (21 loc) · 720 Bytes
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#!/usr/bin/env python
# coding=utf-8
class ContextManagerOpenDemo(object):
def __init__(self, filename, mode):
self.filename = filename
self.mode = mode
def __enter__(self):
print("Starting the Manager.")
self.open_file = open(self.filename, self.mode)
return self.open_file
def __exit__(self, *others):
self.open_file.close()
print("Exiting the Manager.")
#def __exit__(self, exc_type, exc_value, exc_traceback):
#return SyntaxError != exc_type
#return False
with ContextManagerOpenDemo("23501.txt", 'r') as reader:
#with ContextManagerOpenDemo():
print("In the Manager.")
for line in reader:
print(line)