Tag: iteration

Python regex iteration for all combinations

I am new to regex. I am using Python 2.7 and BeautifulSoup4. I want to iterate over a particular regular expression. Required ouput : length : 5 , expression : [a-zA-Z0-9!&#%@] It should try all possible combinations e.g: [‘aaaaa’,’aaaab’,’aaaac’,…,’aaaaz’,’aaaaA’,…,’aaaaZ’,’aaaa0′,’aaaa9′,’aaaa!’,’AAA!!’] Moreover this should be possible too. If the expression is oranged{1} [‘orangea’,’oranges’]] I tried this: I realized that this is a

How to loop over grouped Pandas dataframe?

dataframe iteration pandas pandas-groupby python

DataFrame: Code: I’m trying to just loop over the aggregated data, but I get the error: ValueError: too many values to unpack @EdChum, here’s the expected output: The output is not the problem, I wish to loop over every group. Answer df.groupby(‘l_customer_id_i’).agg(lambda x: ‘,’.join(x)) does already return a dataframe, so you cannot loop over the groups anymore. In general: df.groupby(…)

Intersecting two dictionaries

dictionary intersection iteration python

I am working on a search program over an inverted index. The index itself is a dictionary whose keys are terms and whose values are themselves dictionaries of short documents, with ID numbers as keys and their text content as values. To perform an ‘AND’ search for two terms, I thus need to intersect their postings lists (dictionaries). What is

Walking/iterating over a nested dictionary of arbitrary depth (the dictionary represents a directory tree)

dictionary iteration python recursion tree

Python newbie at time of writing. This came up because I want a user to be able to select a group of files from within a directory (and also any subdirectory), and unfortunately Tkinter’s default ability for selecting multiple files in a file dialog is broken on Windows 7 (http://bugs.python.org/issue8010). So I am attempting to represent a directory structure by

Is there a way to iterate a specified number of times without introducing an unnecessary variable?

coding-style iteration python

If I want to iterate n times in Java, I write: In Python, it seems the standard way to do this is: As always, Python is more concise and more readable. But the x bothers me, as it is unnecessary, and PyDev generates a warning, since x is never used. Is there a way to do this that doesn’t generate