Python (1)

1. Suitable for Chinese

#coding-utf-8

#coding: Utf-8

2, formatted output, at this time the escape character can not use \, only with%

print ' Growth rate:%d \% '% 7

5

3 True and False

if x:    print ‘True‘

As long as a non- x 0 value, a non-empty string, a non-empty list, etc., it is judged True , otherwise False .

4 The Range function indicates that the data set within the entry is generated

range(101)

5 Dict When a nonexistent key is obtained

If key does not exist, Dict will get an error:

>>> d[‘Thomas‘]Traceback (most recent call last):  File "<stdin>", line 1, in <module>KeyError: ‘Thomas‘

To avoid a key that does not exist, there are two ways to in determine whether a key exists:

>>> ‘Thomas‘ in dFalse

The second is the Get method provided by Dict, if key does not exist, you can return none, or the value you specified:

>>> d.get(‘Thomas‘)>>> d.get(‘Thomas‘, -1)-1

Python (1)