What is the difference between python2.7 and 3.5

The differences between python2.7 and 3.5 are: 1. The results of division are different. python2.7 will round directly, while 3.5 does not round; 2. python3.5 does not support mixing tabs and spaces. In the case of indentation, python2.7 supports it; 3. There are differences between the two libraries.

What I will share with you today is the difference between python2.7 and 3.5. It has certain reference value and I hope it will be helpful to everyone.

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(1) Division

a=208,b=5,c=a/b

In python2.7, c will output 41, and it will be rounded directly.

In python3.5, c will output 41.6, without rounding. If you want to round, add an int(a/b) forced conversion

When there is a loop, pay attention to the difference between these two uses

(2) Format

In python3, mixed indentation of tabs and spaces is not supported

(3) Library

In python3, cPickle( python2) has been changed to pickle, and parentheses must be added to print. Without xrange, just use range

items() to replace iteritems()(python2) for places where iteration is required

If In python3, the direct use of

pickle.load(f)
“UnicodeDecodeError:'ascii' codec can't decode byte 0x90in position 614: ordinal notinrange(128)”

should be changed to

pickle.load(f,encoding='latin1' or encoding='bytes')

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