the first week study

1.In 1989, a man named Guido create "python" as a kind of computer languages.

  And now we use Python 3 .

2.Let the python say "hello " to the world.

3. Learn the "variables" in pycharm. Only letter,number and _could be used in the variables. Numbers should not be used at the head of a variable. When you want to use a consisdent, you should write them down in a capital form.

4.Learn the binary system.Know the ASCII, GB2312(1980), GBK1.0(1950), GB18030,Unicode and UTF-8. 

5.Learn the formatting:

6.Learn "if""else""elif".

7.Learn "while""for""continue""break". Know "==","!=".