Re: [Tutor] Read from large text file, find string save 1st string of each line where it appeared.
On 29Dec2015 03:12, Steven D'Aprano wrote: On Mon, Dec 28, 2015 at 04:50:05PM +0530, sutanu bhattacharya wrote: suppose 61746245 is my searching string. so o/p will be [...] I don't understand the question. What is "o/p"? "output" Cheers, Cameron Simpson ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Read from large text file, find string save 1st string of each line where it appeared.
Hi Sutanu,
On 28 December 2015 at 11:20, sutanu bhattacharya <
totaibhattacha...@gmail.com> wrote:
> {'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
> 20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
> 16113331, 12414642]}
>
> suppose 61746245 is my searching string. so o/p will be
> 115160371 (1st string). Area in between third bracket
> ([
> ]) is the searching area...
>
We are not mind readers, and as others have said, you need to provide more
of a description of what you're trying to accomplish and what version of
Python, OS etc you are using.
But, assuming Windows, Python 2.x, and assuming what described as
"searching a string" is in fact more of a looking up id's in lists of id's
held as the values in a Python dict, then simplistically/directly you could
do something as follows:
example.py---
friendsmap1 = {
115160371: [45349980, 22477811, 40566595, 26947037, 16178191,
12984002,
20087719, 19771564, 61746245, 17467721, 32233776,
31052980,
70768904, 16113331, 12414642],
45349980: [22477811, 40566595, 26947037, 16178191],
16178191: [61746245, 17467721, 32233776, 31052980],
31052980: [22477811, 40566595, 32233776, 31052980]
}
friendsmap2 = {
16178191: [61746245, 17467721, 32233776, 31052980],
31052980: [22477811, 40566595, 32233776, 31052980]
}
def friendswith(friendsmap, friendid):
res = [key for key, value in friendsmap.items() if friendid in value]
return res
# Examples:
print friendswith(friendsmap1, 61746245)
print friendswith(friendsmap1, 26947037)
print friendswith(friendsmap2, 61746245)
example.py---
output---
[115160371, 16178191]
[115160371, 45349980]
[16178191]
Walter
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[Tutor] Read from large text file, find string save 1st string of each line where it appeared.
I think what he's looking for is something similar to
grep 6174625 | awk -F ":" {print $1}
I don't know if there is a more efficient Python built-in used to search
for the line containing 6174625 (grep in python) other than simply
iterating though the entire file, with a for loop, line-by-line. You'd also
need to decide whether you want to print all lines containing the
searched-for string or just the first occurence. You can then use the split
method to return the first string on the line, using the semi-colon as the
delimiter.
for line in open("file.txt"):
if "6174625" in line:
return line.split(":")[0]
On Mon, Dec 28, 2015 at 6:20 AM, sutanu bhattacharya <
totaibhattacha...@gmail.com> wrote:
> {'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
> 20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
> 16113331, 12414642]}
>
> suppose 61746245 is my searching string. so o/p will be
> 115160371 (1st string). Area in between third bracket
> ([
> ]) is the searching area...
>
>
> kindly help me to solve this problem..
>
> --
> Sutanu Bhattacharya
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
>
def problem(6174625):
return 115160371
You haven't really described your problem, so above is a solution for what
you asked. What have you tried so far, and what was your result?
--
Joel Goldstick
http://joelgoldstick.com/stats/birthdays
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Re: [Tutor] Read from large text file, find string save 1st string of each line where it appeared.
On Mon, Dec 28, 2015 at 04:50:05PM +0530, sutanu bhattacharya wrote:
> {'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
> 20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
> 16113331, 12414642]}
>
> suppose 61746245 is my searching string. so o/p will be
> 115160371 (1st string). Area in between third bracket ([
> ]) is the searching area...
I don't understand the question.
What is "o/p"?
What do you mean, "searching string"? The string you are searching
*for*, or the string you are searching *in*?
You have something that looks like a dictionary { } followed by an email
address. What does that mean?
If you expect any useful answers, you will have to give a more careful
question. Please show some sample data, and expected result, using
valid Python syntax.
For example:
text = """This is a large string.
It contains many lines of text.
And some numbers: 22477811, 40566595, 26947037
And more numbers: 32233776, 31052980, 70768904
And lots more text.
"""
target = "233"
expected result: "32233776"
--
Steve
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Re: [Tutor] Read from large text file, find string save 1st string of each line where it appeared.
On 28/12/2015 11:20, sutanu bhattacharya wrote:
{'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
16113331, 12414642]}
suppose 61746245 is my searching string. so o/p will be
115160371 (1st string). Area in between third bracket ([
]) is the searching area...
kindly help me to solve this problem..
We will help when you show us the code that you've written. What OS and
Python version are you using?
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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Re: [Tutor] Read from large text file, find string save 1st string of each line where it appeared.
On Mon, Dec 28, 2015 at 6:20 AM, sutanu bhattacharya <
totaibhattacha...@gmail.com> wrote:
> {'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
> 20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
> 16113331, 12414642]}
>
> suppose 61746245 is my searching string. so o/p will be
> 115160371 (1st string). Area in between third bracket
> ([
> ]) is the searching area...
>
>
> kindly help me to solve this problem..
>
> --
> Sutanu Bhattacharya
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
>
def problem(6174625):
return 115160371
You haven't really described your problem, so above is a solution for what
you asked. What have you tried so far, and what was your result?
--
Joel Goldstick
http://joelgoldstick.com/stats/birthdays
___
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[Tutor] Read from large text file, find string save 1st string of each line where it appeared.
{'115160371': [45349980, 22477811, 40566595, 26947037, 16178191, 12984002,
20087719, 19771564, 61746245, 17467721, 32233776, 31052980, 70768904,
16113331, 12414642]}
suppose 61746245 is my searching string. so o/p will be
115160371 (1st string). Area in between third bracket ([
]) is the searching area...
kindly help me to solve this problem..
--
Sutanu Bhattacharya
___
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