初识Python_技术问答

首页免费课初识Python 问答

初识Python

全部评论问答未解决精华

慕姐943659

为什的么系统找不到制定的路径

0 2-3 第一个Python程序

2018-10-04

慕后端4994399

这教程挺好的，不过就是python2的
这个已经过时了，好多地方和python3都有出入
比如
int（12.34）在python会报错
python3 中没有imap,ifilter等
python3中字典中没有iteritems,itervalues属性
range，map返回值都是本身对象的地址，不是list列表，和python2也不一样了

3 10-3 条件过滤

2018-10-04

慕后端4994399

def square_of_sum(L):
s=0
for x in L:
s += x**2
return s

print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])

0 7-3 Python之编写函数

2018-10-03

慕后端4994399

lst = [x*x for x in range(1,101)]
print sum(lst)

1 7-2 Python之调用函数

2018-10-03

慕后端4994399

for x in ['1','2','3','4','5','6','7','8','9']:
for y in ['1','2','3','4','5','6','7','8','9']:
if x < y:
print x+y

0 5-8 Python之多重循环

2018-10-03

慕后端4994399

sum = 0
x = 0
while True:
x = x + 1
if x > 100:
break
if x % 2 == 0:
continue
sum += x
print sum

1 5-7 Python之 continue继续循环

2018-10-03

慕后端4994399

sum = 0
x = 1
n = 1
while True:
sum += x
x = 2**n
n += 1
if n > 20:
break
print sum

1 5-6 Python之 break退出循环

2018-10-03

慕后端4994399

sum = 0
x = 1
n = 1
while True:
sum += x
x = 2**n
n += 1
if n > 20:
break
print sum

0 5-6 Python之 break退出循环

2018-10-03

小毛毛老爹

import math
def answer(a,b,c):
if a!=0:
if b**2-4*a*c>=0:
t=math.sqrt(b**2-4*a*c)
return (-b + t) / (2 * a),( -b - t )/ (2 * a)

else:
return None

else:
return None

3 7-4 Python函数之返回多值

2018-10-03