Python学习笔记之一——变量和简单数据类型

1、变量

      message="Hello Python World!"

      print(message)

2、字符串

      name="ada lovelace"

      print(name.title())   #输出Ada Lovelace

      print(name.upper())  #输出ADA LOVELACE

      print(name.lower())  #输出ada lovelace

      full_name="Hello"+" Python World"  #合并字符串

3、删除空白

      favorite_language=" Python "

      favorite_language.rstrip()  #输出" Python"

      favorite_language.lstrip()  #输出"Python "

      favorite_language.strip()  #输出"Python"

4、str()函数让Python将非字符串值表示为字符串

5、Python之禅

      >>>import this

      The Zen of Python, by Tim Peters

      Beautiful is better than ugly.
      Explicit is better than implicit.
      Simple is better than complex.
      Complex is better than complicated.
      Flat is better than nested.
      Sparse is better than dense.
      Readability counts.
      Special cases aren't special enough to break the rules.
      Although practicality beats purity.
      Errors should never pass silently.
      Unless explicitly silenced.
      In the face of ambiguity, refuse the temptation to guess.
      There should be one-- and preferably only one --obvious way to do it.
      Although that way may not be obvious at first unless you're Dutch.
      Now is better than never.
      Although never is often better than *right* now.
      If the implementation is hard to explain, it's a bad idea.
      If the implementation is easy to explain, it may be a good idea.
      Namespaces are one honking great idea -- let's do more of those!