fanbotao

import csv # newline='' 不会有空行 w/a 覆盖/追加读写 file =open('uuu.csv','w',encoding='utf8',newl...

fanbotao

# 打开文件 import csv file =open('name1.csv','r',encoding='utf8') # 以csv读取数据 按字典读出 data = c...

fanbotao

import csv # newline='' 不会有空行 w/a 覆盖/追加读写 file =open('tttt.csv','w',encoding='utf8',new...

fanbotao

# 打开文件 import csv file =open('name1.csv','r',encoding='utf8') # 以csv读取数据 按列表读出 data = c...

fanbotao

# 打开文件 w/a 覆盖/追加写入 file =open('aa.txt',mode='w',encoding='utf8') # 写入数据 file.writelines...

fanbotao

# 打开文件 file =open('users.txt',mode='r',encoding='utf8') # 读取一行数据 title = file.readline(...

fanbotao

for iin range(1,10): for jin range(1,i+1): print(j,'*',i,'=',i*j," ",end="") print()

fanbotao

# 数字范围 from randomimport choice, random for iin range(1,10,2): print(i) # 随机挑选一个元素 tupl...

fanbotao

tup= (1,2,3,4,6,6,6) # 按下标取元素 t1 =tup[0] t2 =tup[2] print(t1,t2) # 循环取元素 for iin tup: p...

fanbotao

dict1 = {'id':1,'name':'zhangsan','age':11} # 取元素 n = dict1['name'] # 修改元素 添加元素 dict1['...

fanbotao

list1 = [1,2,3,4,5,6,4] # 下标取元素 u1 = list1[0] u2 = list1[2] print(u1,u2) print(list1[1:...

fanbotao

nums = [5,4,3,2,1] tt =0 for iin range(len(nums)-1):# 这个循环负责设置冒泡排序进行的次数 for jin ran...

fanbotao

def score(num): if num>=90: print('A') elif num>=80: print('B') elif num>=70: print('C'...

fanbotao

# 循环读取一个范围里面的数据 for iin range(10): print(i) for iin range(1,10): print(i) for iin range...

fanbotao

from mathimport sqrt, ceil, floor n1 =12 n2 =12.01 # 加减乘除 num1 = n1+n2 num2 = n1-n2 num...

fanbotao

string1 ="s,a,b,c,s" # 下标取字符串里面的元素 # 取第三个元素 s1 = string1[2] print(s1) # 取第二到第三个元素 s2 = ...