Body doesn't contain any code
101 downloader.start()
102
103 # Wait until we know file size
104 while downloader.total_length == 0:105 pass
106
107 file_size = downloader.total_length
Description
In most cases, an empty body of for, while or if implies some piece of code is missing.
Such empty block must be either filled or removed.
Bad practice
for i in range(10):
pass
Preferred:
for i in range(10):
print(i)