重复造轮子太费时间?Python常用技巧快速搞定高频场景

import hashlib# MD5加密def md5_key(arg):    hash = hashlib.md5()    hash.update(arg.encode(encoding='UTF-8'))    return hash.hexdigest()file_name = "C:/Users/Administrator/Desktop/123.txt"with open(file_name) as file_object:    for line in file_object:        line1 = line.rstrip()        md5_string = md5_key(line1)        print(md5_string)

>>> print("%s%s%s" % ("Hello","Python","World"))Hello Python World

>>> str = 'Hello {}! My name is {}.'.format('Python World', 'davieyang')>>> print(str)Hello Python World! My name is davieyang.

>>> str1 = 'Hello { }! My name is { }.'.format('Python World', 'davieyang')Traceback (most recent call last):  File "<stdin>", line 1, in <module>KeyError: ' '

>>> str = 'Hello {1}! My name is {0}.'.format('Python World', 'davieyang')>>> print(str)Hello davieyang! My name is Python World.

>>> str = 'Hello {name}! My name is {name_name}.'.format(name='Python World', name_name='davieyang')>>> print(str)Hello Python World! My name is davieyang.

>>> tuple = ('Hello', '', 'World')>>> print(tuple)('Hello', '', 'World')>>> tuple = ('Hello', ' ', 'World')>>> print(tuple)('Hello', ' ', 'World')>>> like_tuple = ('Hello' ' ' 'World')>>> print(like_tuple)Hello World>>> like_tuple = ('Hello' ' ' 'World' ' ' '1')>>> print(like_tuple)Hello World 1>>> like_tuple = ('Hello' ' ' 'World' ' ' 1)  File "<stdin>", line 1    like_tuple = ('Hello' ' ' 'World' ' ' 1)

>>> from string import Template>>> str = Template('${str1} ${str2}')>>> print(str.safe_substitute(str1 = "Hello", str2 = "world"))Hello world

>>> str1 = "Hello">>> str2 = "World">>> print(str1 + str2)HelloWorld

>>> str_list = ['Hello', 'World']>>> str_join1 = ' '.join(str_list)>>> str_join2 = '_'.join(str_list)>>> print(str_join1)Hello World>>> print(str_join2)Hello_World

>>> str_tuple = ('Hello', 'World')>>> str_join1 = ' '.join(str_list)>>> str_join2 = '_'.join(str_list)>>> print(str_join1)Hello World>>> print(str_join2)Hello_World

>>> name = "world">>> another_name = "davieyang">>> str = f"Hello {name}. My name is {another_name}.">>> print(str)Hello world. My name is davieyang.

>>> some_list = [1,2,3,4,5]>>> another_list = [x+1 for x in some_list]>>> another_list[2, 3, 4, 5, 6]

>>> numbers = [1,2,3,4,5,6,7,8]>>> even = [number for number in numbers if number%2 ==0]>>> even[2, 4, 6, 8]

>>> some_list = [1,2,3,4,5,2,6,4,1,4,5,8,7,9,0,1,2]>>> even_set = {x for x in some_list if x%2 == 0}>>> even_set{0, 2, 4, 6, 8}

>>> d = {x : x%2==0 for x in range(1,11)}>>> d{1: False, 2: True, 3: False, 4: True, 5: False, 6: True, 7: False, 8: True, 9: False, 10: True}

>>> teams = ["aaa", "bbb", "ccc", "ddd"]>>> print({key:value for value, key in enumerate(teams)}){'aaa': 0, 'bbb': 1, 'ccc': 2, 'ddd': 3}

```[表达式为真的返回值] if [表达式] else [表达式为假的返回值]```>>> y=10>>> x =10 if (y==9) else 20>>> x20>>> y=9>>> x =10 if (y==9) else 20>>> x10

>>> class A:...     def __init__(self, param1, param2):...             self.para = param1...             self.param = param2...             print(self.para + self.param)...>>> class B:...     def __init__(self, param1, param2):...             self.para = param1...             self.param = param2...             print(self.param+self.para)...>>> y=1>>> x = (A if y==1 else B)("string1", "string2")string1string2>>> y=2>>> x = (A if y==1 else B)("string1", "string2")string2string1

>>> def small(a,b,c):...     return a if a <=b and a<=c else(b if b<=a and b<=c else c)...>>> small(1,0,1)0>>> small(1,2,2)1>>> small(2,2,3)2>>> small(5,4,3)3

>>> list1 = [m**2 if m > 10 else m**4 for m in range(50)]>>> list1[0, 1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 10000, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900, 961, 1024, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 2304, 2401]

>>> list1 = ["Davieyang", "Davieyang.D.Y"]>>> list2 = ["Ethan", "Alex"]>>> for one, two in zip(list1, list2):...     print(one + " vs " + two)...Davieyang vs EthanDavieyang.D.Y vs Alex

>>> list1 = [1,2,3]>>> list2 = ["davieyang", "Davieyang", "Davieyang.D.Y"]>>> print(dict(zip(list1, list2))){1: 'davieyang', 2: 'Davieyang', 3: 'Davieyang.D.Y'}

>>> teams = ["davieyang","Davieyang","Davieyang.D.Y","davieyang.cool"]>>> for index, teammember in enumerate(teams):...     print(index, teammember)...0 davieyang1 Davieyang2 Davieyang.D.Y3 davieyang.cool

>>> from itertools import combinations>>> list1 = ["a", "b", "c", "d", "e", "f"]>>> for new in combinations(list1, 3):...     print(new)...('a', 'b', 'c')('a', 'b', 'd')('a', 'b', 'e')('a', 'b', 'f')('a', 'c', 'd')('a', 'c', 'e')('a', 'c', 'f')('a', 'd', 'e')('a', 'd', 'f')('a', 'e', 'f')('b', 'c', 'd')('b', 'c', 'e')('b', 'c', 'f')('b', 'd', 'e')('b', 'd', 'f')('b', 'e', 'f')('c', 'd', 'e')('c', 'd', 'f')('c', 'e', 'f')('d', 'e', 'f')

>>> from itertools import permutations>>> list2 = [1,2,3,4,5,6]>>> for new in permutations(list2, 4):...     print(new)...(1, 2, 3, 4)(1, 2, 3, 5)(1, 2, 3, 6)(1, 2, 4, 3)(1, 2, 4, 5)(1, 2, 4, 6)(1, 2, 5, 3)(1, 2, 5, 4)(1, 2, 5, 6)(1, 2, 6, 3)...>>> for new in permutations(list1, 3):...     print(new)...('a', 'b', 'c')('a', 'b', 'd')('a', 'b', 'e')('a', 'b', 'f')...

>>> from collections import Counter>>> c = Counter("Hello World")>>> cCounter({'l': 3, 'o': 2, 'H': 1, 'e': 1, ' ': 1, 'W': 1, 'r': 1, 'd': 1})

>>> c.most_common(2)[('l', 3), ('o', 2)]

>>> from collections import Counter>>> numbers = [1,2,3,4,54,5,6,3,2,3,4,45,2,2,3,34,4,45,5,65,2,2,34,4,5]>>> print(Counter(numbers).most_common()[0][0])2>>> print(max(set(numbers), key=numbers.count))2

>>> list1 = [1,2,3,4,5]>>> list2 = [2,3,7,8,9]>>> print(set(list1)|set(list2)){1, 2, 3, 4, 5, 7, 8, 9}>>> print(set(list1).union(set(list2))){1, 2, 3, 4, 5, 7, 8, 9}

>>> list1 = [1,2,3,4,5]>>> list2 = [2,3,7,8,9]>>> print(set(list1)&set(list2)){2, 3}>>> print(set(list1).intersection(set(list2))){2, 3}>>>

>>> list1 = [1,2,3,4,5]>>> list2 = [2,3,7,8,9]>>> print(set(list1)-set(list2)){1, 4, 5}>>> print(set(list1).difference(set(list2))){1, 4, 5}>>>

>>> list1 = [1,2,3,4,5]>>> list2 = [2,3,7,8,9]>>> print(set(list1)^set(list2)){1, 4, 5, 7, 8, 9}>>> print(set(list1).symmetric_difference(set(list2))){1, 4, 5, 7, 8, 9}

>>> list1 = [11,22,33,33,44,55,55,66]>>> set1 = set(list1)>>> set1{33, 66, 11, 44, 22, 55}>>> list1 = list(set1)>>> list1[33, 66, 11, 44, 22, 55]

>>> list1 = [11,22,33,33,44,55,55,66]>>> list1 = {}.fromkeys(list1).keys()>>> list1dict_keys([11, 22, 33, 44, 55, 66])

>>> list1 = [11,22,33,33,44,55,55,66]>>> list2 = []>>> list3 = [list2.append(i) for i in list1 if i not in list2]>>> list2[11, 22, 33, 44, 55, 66]

>>> list1 = [11,22,33,33,44,55,55,66]>>> list2 = list(set(list1))>>> list2.sort(key=list1.index)>>> list2[11, 22, 33, 44, 55, 66]

from sys import argvimport requestsimport jsonimport timescript, userId, userName, enterpriseId = argvparameter = {"userId":{userId},"userName":{userName},"enterpriseId":{enterpriseId},"flag":"sended"}rq = requests.put("http://test.xxxxxx.com/mail/receiveSendedAndRubbishMail", data=parameter)data = rq.json()print(json.dumps(data, indent=4, sort_keys=True, ensure_ascii=False) )

python filename.py userId userName enterpriseId

import requestsimport jsonimport timeprompt = '>>> 'print("Please Input 'userID', For Example>>>1400")userId = input(prompt)print("Please Input 'userName', For Example>>>yangdawei_10171")userName = input(prompt)print("Please Input 'enterpriseId', For Example>>>10171")enterpriseId = input(prompt)print(f"The Program is starting to syc {userId}--{enterpriseId}--{userName}'s email and how much time is going to spend that's depends on how many emails in outbox, Just wait...")before_syc_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))print("current time is" + ' ' + before_syc_time)parameter = {"userId":{userId},"userName":{userName},"enterpriseId":{enterpriseId},"flag":"sended"}rq = requests.put("http://admin.xxxxxxx.com/mail/receiveSendedAndRubbishMail", data=parameter)data = rq.json()print(json.dumps(data, indent=4, sort_keys=True, ensure_ascii=False) )after_syc_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))print("current time is" + ' ' + after_syc_time)input('Press Enter to exit program and then close this dialog....')

python filename.py