#条件循环&其他语句
from math import sqrt as foobar
print(foobar(4))
#赋值魔法
x, y, z = 1, 2, 3
print(x, y, z)
x, y = y, x
print(x, y, z)
values = 3, 2, 1
print('values: ', values)
x, y, z = values
print('x,y,z:', x, y, z)
scoundrel = {'name': 'robin', 'girlfriend': 'Marion'}
key, value = scoundrel.popitem()
print('key:', key)
print('value:', value)
x = 2
x += 1
x *= 2
print('x:', x)
fnord = 'foo'
fnord += 'bar'
fnord *= 2
print('fnord: ', fnord)
print(bool('42'))
print(bool(''))
print(bool(0))
print(bool(None))
print(bool({}))
# encoding: utf-8 from math import sqrt as foobar print foobar(4)
#coding:utf-8 from math import sqrt as foobar # 使用as将import的函数重命名，避免import的函数有重复的 print foobar(4) age = 4 assert 0 < age < 100 # assert 10 < age < 100, 'error age' zname = ['Micky', 'Jane', 'John', 'Ann'] zage = [18, 21, 9, 22] for name, age in zip(zname, zage): # zip可以将两个序列合并在一起，合并按少的来 print name, age for index, name in enumerate(zname): # 枚举 print index, name f1 = [x * x for x in range(10)] print f1 f2 = [x * x for x in range(20) if x % 3 == 0] print f2 f3 = [(x, y) for x in range(3) for y in range(4)] print f3 f4 = [(x, y) for x in range(5) if x % 2 == 0 for y in range(20) if y % 3 == 0] print f4 f5 = [x + y + x * y for x in range(10) if x % 2 == 0 for y in range(20) if y % 3 == 0] print f5
from math import sqrt as foobar print(foobar(7))
from math import sqrt as foobar
print(foobar(25))
scoundrel = {'name': 'Robin', 'girlfriend': 'Marion'}
a1, a2 = scoundrel.popitem()
print(a1, a2)
print(bool(0))