Python Regex with Paramiko

I am using Python Paramiko module to sftp into one of my servers. I did a list_dir() to get all of the files in the folder. Out of the folder I'd like to use regex to find the matching pattern and then printout the entire string.

list_dir()

List_dir will list a list of the XML files with this format

LOG_MMDDYYYY_HHMM.XML

LOG_07202018_2018 --> this is for the date 07/20/2018 at the time 20:18


Id like to use regex to file all the XML files for that particular date and store them to a list or a variable. I can then pass this variable to Paramiko to get the file.

for log in file_list:
regex_pattern = 'POSLog_' + date + '*'
if (re.search(regex_pattern, log) != None):
matchObject = re.findall(regex_pattern, log)
print(matchObject)


the code above just prints:
['Log_07202018'] I want it to store the entire string Log_07202018_20:18.XML to a variable.

['Log_07202018']

Log_07202018_20:18.XML

How would I go about doing this?

Thank you

2 Answers
2

If you are looking for a fixed string, don't use regex.

search_str = 'POSLog_' + date

for line in file_list:
if search_str in line:
print(line)


Alternatively, a list comprehension can make list of matching lines in one go:

log_lines = [line for line in file_list if search_str in line]

for line in log_lines:
print(line)


If you must use regex, there are a few things to change:

*

.*

^

^

MULTILINE

There are several ways of getting all matches. One could do "for each line, if there is a match, print line", same as above. Here I'm using .finditer() and a search over the whole input block (i.e. not split into lines).

.finditer()

log_pattern = '^POSLog_' + re.escape(date) + '.*'

for match in re.finditer(log_pattern, whole_file, re.MULTILINE):
print(match.string)


if search_str in line

Because you only print the matched part, just do print(log) instead and it'll print the whole filename.

print(log)

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