#--------------------------------------------------------------------------------------- # 字符串連接 : 方法1 '+' str0 = 'hello' str1 = "python" print(str0 + str1) #'hellopython'# 字符串連接 : 方法2 連接對(duì)象.join() : 在每個(gè)單詞之間用連接對(duì)象連接起來 lst = ['www','google','com'] lst_join = ".".join(lst) print(lst_join) #'www.google.com'#--------------------------------------------------------------------------------------- # 格式化字符串1: 占位符'{}' name = 'Tom' age = 20 addr = "上海市" info = '{0},{1},{2}'.format(name, age, addr) print(info) #'Tom,20,上海市'#--------------------------------------------------------------------------------------- # 格式化字符串2: 占位符'{}' print("{name},{age},{addr}".format(name = "Tom", age = 22, addr = "上海市")) #'Tom, 22, 上海市'#--------------------------------------------------------------------------------------- # 格式化字符串3: % num = 100 str_tmp = "%d years" % num print(str_tmp) #'100 years' lang = "python" print("I love %(program)s" % {"program" : lang}) #"I love python"#--------------------------------------------------------------------------------------- # len() : 獲取字符串長(zhǎng)度 str1 = "hello" print(len(str1)) #5#--------------------------------------------------------------------------------------- # 字符串.isalpha() : 判斷字符串對(duì)象是否全部為字母, True(全部為字符), False(含非字母) str2 = "world2" str3 = 'hehe he' print('str1 : ' + str(str1.isalpha())) #True print('str2 : ' + str(str2.isalpha())) #False print('str3 : ' + str(str3.isalpha())) #False#-------------------------------------------------- # str.split() : 分割字符串 str4 = "www.itdiffer.com" for str_tmp in str4.split("."):print(str_tmp) #'www' 'itdiffer' 'com'#-------------------------------------------------- # str.strip() : 去掉str左右兩邊的空格 str5 = " he ha ho " print('去掉前,str5:' + str5 + ':長(zhǎng)度' + str(len(str5))) str5 = str5.strip(); print(str5) print('去掉后,str5:' + str5 + ':長(zhǎng)度' + str(len(str5)))#-------------------------------------------------- # str.lstrip() : 去掉str左邊的空格 str5 = " hehe" print(str5.lstrip())#-------------------------------------------------- # str.rstrip() : 去掉str右邊的空格 str6 = "hehe " print(str6.rstrip())#-------------------------------------------------- # str.upper() : 將小寫字母,全部轉(zhuǎn)換為大寫 str7 = "hello python" print(str7.upper())#-------------------------------------------------- # str.lower() : 將大寫全部轉(zhuǎn)換為小寫 str8 = "HELLO PYTHON" print(str8.lower())#-------------------------------------------------- # str.isupper() : 判斷當(dāng)前字符串是否全部為大寫 str9 = "hello" str10 = "HELLO" print(str(str9.isupper())) #False print(str(str10.isupper())) #True#-------------------------------------------------- # str.islower() : 判斷當(dāng)前字符串是否全部為小寫 str11 = "Hello" str12 = "python" print(str(str11.islower())) #False print(str(str12.islower())) #True#-------------------------------------------------- # str.title() : 將字符串中每個(gè)單詞的首字母轉(zhuǎn)換為大寫(如果字符串全部為大寫,則轉(zhuǎn)化結(jié)果為:每個(gè)單詞的首字母大寫其他字母小寫) str13 = "hello Pyhton" str14 = "hello python" str15 = "HELLO PYTHON" str13_title = str13.title() #'Hello Python' str14_title = str14.title() #'Hello Python' str15_title = str15.title() #'Hello Python' print('str13:{0}'.format(str13)) print('str14:{0}'.format(str14)) print('str15:{0}'.format(str15)) print('str13_title:' + str13_title) #'str13_title:Hello Pyhton' print('str14_title:' + str14_title) #'str14_title:Hello Pyhton' print('str15_title:' + str15_title) #'str15_title:Hello Pyhton' print(str(str13_title.istitle())) #True print(str(str14_title.istitle())) #True print(str(str15_title.istitle())) #True#-------------------------------------------------- # str.istitle() : 判斷每個(gè)單詞的首字母是否為大寫 str16 = "hEllo" str17 = "World" str18 = "Hello,World" str19 = "Hello,world" print(str(str16.istitle())) #False print(str(str17.istitle())) #True print(str(str18.istitle())) #True print(str(str19.istitle())) #False#-------------------------------------------------- # str.capitalize() : 將字符串的第一個(gè)字母變?yōu)榇髮?/span> str20 = "hello python" str20_capitalize = str20.capitalize(); print(str(str20_capitalize)) #'Hello pythn'

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轉(zhuǎn)載于:https://www.cnblogs.com/zuiwohongchen/p/6668891.html

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