Test your Python level----7

1. Q: What is the difference between Cpython,jython and IronPython?
A: All three are the implementation of the Python compiler, CPython is the standard implementation of Python, Jypthon is the Java implementation of Python, IronPython is a python. NET implementation.

2. Q: What is the purpose of exec,eval,execfile?
A: 1) EXEC executes the python statement stored in the string, such as exec ("print ' Hello world! '");
2) eval evaluates the stored string as an expression, such as eval ("1+2+3+4+5+6");
3) execfile is used to execute a file script, such as execfile ("test.py");

3, Q: How to view all the properties of a module?
Answer: Dir (modulename)
The Ps:dir function is really a great invention in Python that gets the properties of the module through its reflection;

4. Q: Please use Python to get the contents of the http://www.freelycode.com (free Code) homepage.
A: The use of Urllib module implementation;
Import Urllib
def gethtml (URL):
page = Urllib.urlopen (URL)
html = Page.read ()
return HTML

html = gethtml ("http://www.freelycode.com")
Print HTML


5. (5 python questions per day (6)) readers have proposed the last fifth interception of text more than 80 characters lines, the implementation of the program to be considered thoughtful, mainly:
1) does not take into account a line greater than 160 characters
2) The stitching problem of the interception line,
The author has re-perfected the procedure as follows:
Import OS

Fpout=open (' Test.txt ', ' R ')
Fpin=open (' Test1.txt ', ' W ')

Left= ""
For line in Fpout:

#先拼接

Line=left+line

Leng=len (line)

if Len (line) >80:

count=leng/80

for I in Range (count):

for I in Range (80,0,-1):

#从最接近80的单词截取

if line[i].isspace ():

fpin.write (line[0:i]+ ' \ n ')

Line=line[i+1:]

Break

#处理剩余行用于拼接

left=line.replace ("\ n", "")

Else

Fpin.write (line)

Test your Python level----7