利用python完成（1）使用Python创建名为”Blowing in the wind.txt”的文件。 （2）在文件中添加如下内容： How many roads must a man walk down Before they call him a man How many seas must a white dove sail Before she sleeps in the sand （3）在文件头部插入歌名：Blow in the wind。 （4）在歌名后插入歌手名：Bob Dylan （5）在文件末尾加上字符串：1962 by Warner Bros.Inc. （6）在屏幕上打印文件内容。

以下是实现上述要求的Python代码：

# 创建文件并写入初始内容
with open('Blowing in the wind.txt', 'w') as f:
    f.write('How many roads must a man walk down\nBefore they call him a man\nHow many seas must a white dove sail\nBefore she sleeps in the sand\n')

# 在文件头部插入歌名
with open('Blowing in the wind.txt', 'r+') as f:
    content = f.read()
    f.seek(0, 0)  # 移动文件指针到文件头部
    f.write('Blow in the wind\n')
    f.write(content)

# 在歌名后插入歌手名
with open('Blowing in the wind.txt', 'r+') as f:
    content = f.read()
    f.seek(0, 0)  # 移动文件指针到文件头部
    f.write('Blow in the wind\nby Bob Dylan\n')
    f.write(content)

# 在文件末尾添加字符串
with open('Blowing in the wind.txt', 'a') as f:
    f.write('1962 by Warner Bros.Inc.\n')

# 打印文件内容
with open('Blowing in the wind.txt', 'r') as f:
    content = f.read()
    print(content)

运行以上代码后，会在当前目录下创建一个名为“Blowing in the wind.txt”的文件，并按照要求写入内容。最后一行会在屏幕上打印文件的完整内容。