convert number to string in python

Question

I meet a problem about converting number to string.

I want to get a string \"0100\" from str(0100), but what I got is \"64\". Does any way I can do to get a string \"010

Answer 1

In Python2, a leading 0 on a numeric literal signifies that it is an octal number. This is why 0100 == 64. This also means that 0800 and 0900 are syntax errors

It's a funny thing that's caught out many people at one time or another.

In Python3, 0100 is a syntax error, you must use the 0o prefix if you need to write a octal literal. eg. 0o100 == 64