About the Python script at the beginning two lines explained

#!/usr/bin/python
Specify what interpreter to use to run the script and where the interpreter is located

#-*-Coding:utf-8-*-
Used to specify that the file is encoded as Utf-8.

This stuff is commonly used in CGI scripts, where Apache launches CGI scripts to know that this is a Python script and where to execute the Python interpreter path it needs.
Sometimes writing #!/usr/bin/python or not, very simple, because the Python interpreter is not installed in the/usr/bin/directory, change to its directory is OK, or more general method is:
#!/usr/bin/env python

About the Python script at the beginning two lines explained