1、输出

print ("hello, world") #逗号隔开 print('The quick brown fox', 'jumps over', 'the lazy dog') #计算 print('1+2=',1+2) #反斜杠 \n换号，\t制位 print('I\'m learning\nPython.') #直输r print(r'I\'m learning\nPython.') #直输换行 print('''line1
line2
line3''') 

2、输入

name = input('what\'s your name ?') print ('hi,',name) 

3、python：缩进方式，大小写敏感

#默认字符串，强制转换 a = int(input("input a number")) if a >= 0: print(a) else: print(-a) 

4、编码

print(ord('A')) print(chr(66)) print('ABC'.encode('ascii')) 

5、list
从0开始有序集合

classmates = ['Michael', 'Bob', 'Tracy'] print (classmates) print (classmates[0]) 

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