Python学习过程中知识误区总结

1. a**b==a*b+a
2. 字符串 ‘abc‘ 3 * ‘ab‘== ‘ababab‘   ‘a‘+str(123) == ‘a123‘
3. len(‘abc‘) ==3

          indexing  ‘abc‘[0] == ‘a‘   ‘abc‘[-1] == ‘c‘ 

          Slicing       ‘abc‘[1:3] == ‘bc‘     [i:j:k]   最后一个参数 step 为负时，表示截取结果按照逆序排列

     4.  in

The operators in and not in test for collection membership (a ‘collection‘ refers to a string, list, tuple or dictionary - don‘t worry, we will cover lists, tuples and dictionaries soon!). The expression

Note this returns the negation of element in coll - that is, the expression element not in coll is equivalent to the expression not (element in coll).

    5.

    6.

Python学习过程中知识误区总结

原文：http://www.cnblogs.com/fusama/p/4586741.html