Learn Python the hard

Reference

Zed Shaw-learn Python the Hard

Ex0:the Setup

Windows

Python 2, Atom, Terminal.

EX1:A Good First Program

Keyword

1 Print 2 Print " "

Run the file

1 python ex1.py

Error

Garbled Chinese

Possible Solutions (unfortunately, none of them works.)

1. Add ASCII Encodings

1 # -*-coding:utf-8-*-

2. Decode & ENCODE01

1 Print ' English '. Decode ("utf-8"). Encode ("gb2312") 2 Print ' English '. Decode ("utf-8"). Encode ("gbk")

3. CHCP COMMAND01, 02

1 chcp 65001

01 about the Python output in the win terminal Chinese garbled problem

Windows Setup cmd command line encoding

Ex2:comments and Pound characters

Keywork

1 # 2 # Comments

Q: If # is for comments and then how come # -*-coding: utf-8 -*- works?

A: Python still ignores as code, but it's used as a kind of "hack" or workaround for problems with setting and detecting The format of a file. You also find a similar kind of the comment for editor settings.

Q: Why does the # in print "Hi # there." not get ignored?

A: The # in that code was inside a string, so it would be put-into the string until the ending "character was hit. These pound characters is just considered characters and aren ' t considered comments.

Ex3:numbers and Math

Keywords

1+#Plus2-#minus3/#Slash:7/4 = 1; 7.0/4.0 = 1.754*#Asterisk5%#percent; modulus:x divided by Y with J-remaining, the result of is the J part.6<#Less-than7>#Greater-than8<=#less-than-equal9>=#greater-than-equal

Ex4:variables and Names

Ex5:more Variables and Printing

Keywords

1 ' Black ' 2 ' Black ' 3 Print " She ' s got%s eyes and%s hair. " % (My_eyes, My_hair)

Operations String Formatting

Differences between%r and%s in Python

Learn Python the hard