python的基本数据类型有哪些？

#转义字符print('abcdef')#为转义字符print(r'abcdef')#字符串前面加r表示不转义运行结果：abcdefabcdef

a = "abcde"b = a[-1] #访问最后一个元素c = a[0:4]#访问序列在0到4之间的元素不包括4print(b)print(c)运行结果：eabcd

a = "abcd"print(a[0])b = a.replace('d','def')print(b)print(a.find('d'))#字符串查询运行结果：aabcdef3

#【1】直接相加a = 'my name is xiaobin'b = 'tong'c = a + bprint(c)运行结果：my name is xiaobintong#【2】占位符print('my name is %s xiaobin' % 'tong')#%s为字符串占位符,%d为数字占位符print('my name is %s xiaobin,i'm %s years old' % ('tong',24))print('my name is {1}, i'm {0} years old'.format('24','tongxiaobin'))#用format方法运行结果：my name is tong xiaobinmy name is tong xiaobin,i'm 24 years oldmy name is tongxiaobin, i'm 24 years old#【3】joina = '123'b = '456'c = '789'd = ''.join([a,b,c])e = ';'.join([a,b,c])print(d)print(e)运行结果：123456789123;456;789

#写操作d = open('1.txt','w')d.write('hello worldmy name is tongxiaobin')d.close()#读操作e = open('1.txt','r')print(e.readline())#按行读取print(e.readline())运行结果：hello worldmy name is tongxiaobin#末尾添加操作a = open('1.txt','a')a.write('come from anhui')a.close()打开文件结果为：hello worldmy name is tongxiaobinfdsdcome from anhui

import linecachelinecache.getline('1.txt',2)运行结果：'my name is tongxiaobin'linecache.getlines('1.txt')运行结果：['hello world', 'my name is tongxiaobin', 'come from anhui']