整理于2020年10月下旬，献给不甘平凡的你
更多企业级爬虫知识请查收于：https://blog.csdn.net/weixin_45316122/article/details/109843899
目录
一.实战Demo
二.unittest知识补充
一.实战Demo
2
import unittest
class a(unittest.TestCase):
def setup(self):
print("启动了调定")
def tarDown(self):
print("Tearing down the test")
def test_two(self):
total = 2+2
self.assertEqual(4,total)
if __name__ == '__main__':
unittest.main(argv=[''],exit=False)
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
3
#数字
x = 2.3435
round(x,2)
3
2.34
7
<2>e<2>
File "<ipython-input-7-b71bc519f518>", line 1
<2>e<2>
^
SyntaxError: invalid syntax
10
z = 2 +4j
z.real
# z.imag 输出是个实数
10
2.0
11
10//3
11
3
15
10%3
15
1
17
max(1,2,3,4,5,6)
17
6
19
int(10)
19
10
21
float(10
)
21
10.0
22
len(10154)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-22-9bc3ca544176> in <module>
----> 1 len(10154)
TypeError: object of type 'int' has no len()
26
#字符串
len('a b')
26
3
30
"ABc".lower()
30
'abc'
33
'B,C'.split('，')
33
['B,C']
36
"a ssa a".count("a")
36
3
38
"python".replace("n",".i")
38
'pytho.i'
41
"python".center(8,"=")
41
'=python='
43
"python".strip("pn")
43
'ytho'
46
",".join("12345")
46
'1,2,3,4,5'
52
"{1:=^20}".format("python","adad")
#:引导 1,format的位数从0开始 =填充的东西 居中对齐，20输出长度
52
'========adad========'
55
"{:10}".format("bat")
55
'bat '
57
"{0:,.2f}".format(123456.569)
57
'123,456.57'
71
a =1
a if a>0 else a<0
71
1
73
{1,2,3,4}|{2,3,4,5}
73
{1, 2, 3, 4, 5}
75
{1,2,3,4}-{2,3,4,5}
75
{1}
76
{1,2,3,4}|{2,3,4,5}
76
{1, 2, 3, 4, 5}
78
{1,2,3,4} & {2,3,4,5}
78
{2, 3, 4}
81
{1,2,3,4} ^ {2,3,4,5}
81
{1, 5}
No output
二.unittest知识补充
python3+unittest参考
https://www.cnblogs.com/yizhipanghu/p/13516715.html
Python接口自动化测试之pytest与unittest区别
https://www.jianshu.com/p/db98f6f9b111
