Rapid GUI Programming with Python and Qt: The Definitive Guide to PyQt Programming

18. Networking

• Creating a TCP Client
• Creating a TCP Server

Currency Converter 121

The Python standard library has many modules that provide networking facilities. We saw one example of a standard library networking function back in Chapter 4, when we used urllib2.urlopen() to provide a “file handle” to a file on the Internet that we then read line by line using the for line in fh: idiom. It is also possible to just “grab” an entire file from the Internet:

source = "http://www.amk.ca/files/python/crypto/" + \         "pycrypto-2.0.1.tar.gz"target = source[source.rfind("/") + 1:]name, message = urllib.urlretrieve(source, target)

The name holds ...