初识Python_技术问答

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初识Python

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chinajackjin

# -*- encoding=utf-8 -*-
import math as m
def do_quadratic_equation(a,b,c):
dt = b*b-4*a*c
if dt < 0 :
return "b*b-4ac不能小于0"
else:
x1 = (-b+m.sqrt(dt))/(2*a)
x2 = (-b-m.sqrt(dt))/(2*a)
return x1,x2

0 7-4 Python函数之返回多值

2018-04-13

chinajackjin

# -*- coding=utf-8 *-*

s = set([('Adam', 95), ('Lisa', 85), ('Bart', 59)])

# tup 元祖 ()
for tup in s :
print tup[0] + ":" + str(tup[1])

0 6-9 Python之遍历set

2018-04-13

chinajackjin

# -*- coding: utf-8 -*-
months = set(['Jan','Feb','Mar','Apr','May','Jane','July','Aug','Sep','Oct','Nov','Dec'])

x1 = "Jan"
x2 = "jan"
print ('x1:'),
if x1 in months:
print "ok"
else:
print "error"

print ('x2:'),
if x2 in months:
print "ok"
else:
print "error"

#这要求的输出格式啃爹啊！

1 6-8 Python之 set的特点

2018-04-13

幕布斯9007020

for x in range(1,10):
for y in range(10):
if(x<y):
print ('%d%d' % (x,y))
else:
continue
这样比较好

0 5-8 Python之多重循环

2018-04-13

chinajackjin

s = set(['Adam', 'Lisa', 'Bart', 'Paul'])

rtnSet = set([])

for name in s :
name = name.lower()
rtnSet.add(name)

print ('adam' in rtnSet)
print ('bart' in rtnSet)

1 6-7 Python之访问set

2018-04-13