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Use of context manager
Hello @jamesdensmore,
Thanks for the great book! I've gone through some parts and wondered whether the usage of the 'with' context manager when opening files does not make the close statement redundant, e.g. in https://github.com/jamesdensmore/datapipelinesbook/blob/main/ch04/extract_mongodb.py:
with open(export_file, 'w') as fp:
csvw = csv.writer(fp, delimiter='|')
csvw.writerows(all_events)
fp.close()
since the part within the context manager could be rewritten to:
fp = open(export_file, 'w')
try:
csvw = csv.writer(fp, delimiter='|')
csvw.writerows(all_events)
finally:
fp.close()
Or is there any other reason for the usage?
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