Python 编写函数实现交叉合并字符串，例如：ABCD与1234的合并结果是A1B2C3D4_python将两个字符串交插合并

编写函数实现交叉合并字符串，例如：ABCD与1234的合并结果是A1B2C3D4 ：

def mergeStr(str1, str2):
    str3 = ""
    i = 0
    for str in str1:
        if i < len(str2):
            str3 += str + (str2[i])
            i += 1
 
    if i < len(str2):        
        for item in range(i, len(str2)):
            str3 += str2[i]
            i += 1
        return str3
    
    else:
        for item in range(i, len(str1)):
            str3 += str1[i]
            i += 1
        return str3
 
 
if __name__ == '__main__':
    str1 = input("please input first string:\n")
 
    str2 = input("please input second string:\n")
 
 
    print("After the merger：\n"++ str(mergeStr(str1, str2)))

编程思路：

用两个不同的字符串来存储自己要输入的字符串，用一个空白的字符串来把合并后的字符串存储。

定义一个类图书类，图书信息为IBSN、书名、作者、出版社和定价。通过类方法能够显示所有图书信息：

class Book:
    IBSN = "00001"
    name = "Name"
    author = "Author"
    publisher = "publisher"
    price = "price"
 
    def __init__(self, IBSN, name, author, publisher, price):
        Book.IBSN = IBSN
        Book.name = name
        Book.author = author
        Book.publisher = publisher
        Book.price = price
 
    def to_string(self):
        print("------图书信息为：------\n" +
            "IBSN: " + self.IBSN + "\n"
              + "书名: " + self.name + "\n"
              + "作者: " + self.author + "\n"
              + "出版社: " + self.publisher + "\n"
              + "价格: " + str(self.price))
 
    # 类方法
    @classmethod
    def to_string(self):
        print("------图书信息为：------\n" +
              "IBSN: " + self.IBSN + "\n"
              + "书名: " + self.name + "\n"
              + "作者: " + self.author + "\n"
              + "出版社: " + self.publisher + "\n"
              + "价格: " + str(self.price))
if __name__ == '__main__':
    Book(input('请输入IBSN号：'), input('请输入书名：'), input('请输入作者：'), input('请输入出版社'), float(input('请输入价格：')))
    Book.to_string()

这位大佬指导：happy488127311的博客_CSDN博客