formatted input

[Bob]

Hi All,
I have another question about formatted input. Suppose I am reading a
text file, and that I want it to be something like this

word11 = num11, word12 = num12, word13 = num13 etc...
word21 = num21, word22 = num12, word23 = num23 etc...
etc...

where wordx1 belongs to a certain dictionary of words, say dic1, while
wordx2 belongs to dic2, the numbers within some range and so on. I was
wondering if there is something in the standard library I may use to
check whether the file I am reading has a correct syntax according to
my rules/dictionaries instead of implementing my own routine that
would look like
(pseudocode)
for each line
put words into a list
check condition for each word

Thanks

 

[Diez B. Roggisch]

Hi All,
I have another question about formatted input. Suppose I am reading a
text file, and that I want it to be something like this

word11 = num11, word12 = num12, word13 = num13 etc...
word21 = num21, word22 = num12, word23 = num23 etc...
etc...

where wordx1 belongs to a certain dictionary of words, say dic1, while
wordx2 belongs to dic2, the numbers within some range and so on. I was
wondering if there is something in the standard library I may use to
check whether the file I am reading has a correct syntax according to
my rules/dictionaries instead of implementing my own routine that
would look like
(pseudocode)
for each line
put words into a list
check condition for each word

No, there is no such thing. Either write something from scratch using
string methods, or use pyparsing which is certainly up to the task (and
much more)

Diez

 

[Kenny Meyer]

Hi All,
I have another question about formatted input. Suppose I am reading a
text file, and that I want it to be something like this

word11 = num11, word12 = num12, word13 = num13 etc...
word21 = num21, word22 = num12, word23 = num23 etc...
etc...

where wordx1 belongs to a certain dictionary of words, say dic1, while
wordx2 belongs to dic2, the numbers within some range and so on. I was
wondering if there is something in the standard library I may use to
check whether the file I am reading has a correct syntax according to
my rules/dictionaries instead of implementing my own routine that
would look like

Python's `re` module

(pseudocode)
for each line
put words into a list
check condition for each word

import re

match_1 = re.compile("^words1")
match_2 = re.compile("^words2")

# Return a match object each
re.match(match_1, "word11")
re.match(match_2, "word21")


I'm sure there are might be other ways to do the same thing.