python 字符串居中

下面的代码可以让字符串居中，左对齐和右对齐，字符串长度设置为50，居中后左右补充空格，右对齐会在左侧补充空格

string1 = "Now I am here."
print( string1.center(50))
print( string1.rjust(50))
print (string1.ljust(50))

result:

                  Now I am here.                  
                                    Now I am here.
Now I am here.