This question seemed a good excercise so I banged out a little script
(which worked) but latter I saw posts showing code that by using string
method 'partition' provided a more elegant solution.
I was previously unaware of this method. My "bible" has been David M.
Beazley's Python Essential Reference (3rdEd) in which this method is not
mentioned (that I can see.)
Should I switch "bibles?"
(I often find myself wanting to hack in "off line environments" so
something as old fashion as a book would be nice:-)
Here's my script for what it's worth:
#!/usr/bin/env python
import sys
usage = """test0 separator
Requires one parameter, the text to be used to separate the input which
will be requested by the program."""
if len(sys.argv) != 2:
print usage
separator = sys.argv[1]
def separate(string, separator):
ret = []
i = string.find(separator)
l = len(separator)
while i > 0:
ret.append(string[:i])
ret.append(separator)
string = string[i+l:]
i = string.find(separator)
ret.append(string)
return ret
def repart(string, separator):
"""Does the same as separator but using string method 'partition'"""
parts = string.partition(separator)
if parts[0] == string:
return (parts[0], )
else:
return parts[:-1] + repart(parts[-1], separator)
input_str = raw_input("Enter text to split on '%s': "%(separator, ))
separated_array = separate(input_str, separator)
for s in separated_array:
print s
parted_array = repart(input_str, separator)
for s in parted_array:
print s
> Hi all,
> I'm new to programming and Python.
> I want to write a script that takes a string input and breaks the string
> at
> keywords then outputs the pieces on separate lines.
> I'm not sure how to break the string, though.
> I looked through the docs and found split() and partition(), which come
> close.
> But split() doesn't retain the separator and partition() retains the white
> space and returns a 3-tuple which I'll have to figure out how to rejoin
> nor
> does it partition on subsequent instances of the separator.
>
> Here's the script in its basic form:
>
> #!/usr/bin/python
>
> text = raw_input("Enter text: ")
> print "You entered ", text
>
> objects = text.partition(' and')
> print objects
>
> for object in objects: # Second Example
>
> print object
>
> For example, if I run this with the input:
> "Ham and cheese omelette with hasbrowns and coffee."
> I get:
> Ham
> and
> cheese omelette with hashbrowns and coffee.
>
> Any help is greatly appreciated.
> _______________________________________________
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
