I have many folders where each has a couple of pdf files (other file types like .xlsx or .doc are there as well). My goal is to extract the pdf's text for each folder and create a data frame where each record is the "Folder Name" and each column represents text content of each pdf file in that folder in string form.
I managed to extract text from one pdf file with tika
package (code below). But can not make a loop to iterate on other pdfs in the folder or other folders so to construct a structured dataframe.
# import parser object from tike
from tika import parser
# opening pdf file
parsed_pdf = parser.from_file("ducument_1.pdf")
# saving content of pdf
# you can also bring text only, by parsed_pdf['text']
# parsed_pdf['content'] returns string
data = parsed_pdf['content']
# Printing of content
print(data)
# <class 'str'>
print(type(data))
The desired output should look like this:
Folder_Name | pdf1 | pdf2 |
---|---|---|
17534 | text of the pdf1 | text of the pdf 2 |
63546 | text of the pdf1 | text of the pdf1 |
26374 | text of the pdf1 | - |
If you want to find all the PDFs in a directory and its subdirectories, you can use os.listdir
and glob
, see Recursive sub folder search and return files in a list python . I've gone for a slightly longer form so it is easier to follow what is happening for beginners
Then, for each file, call Apache Tika, and save to the next row in the Pandas DataFrame
#!/usr/bin/python3
import os, glob
from tika import parser
from pandas import DataFrame
# What file extension to find, and where to look from
ext = "*.pdf"
PATH = "."
# Find all the files with that extension
files = []
for dirpath, dirnames, filenames in os.walk(PATH):
files += glob.glob(os.path.join(dirpath, ext))
# Create a Pandas Dataframe to hold the filenames and the text
df = DataFrame(columns=("filename","text"))
# Process each file in turn, parsing with Tika and storing in the dataframe
for idx, filename in enumerate(files):
data = parser.from_file(filename)
text = data["content"]
df.loc[idx] = [filename, text]
# For debugging, print what we found
print(df)
Extremely easy to have a list of all pdfs on unix.
import os
# saves all pdf in a string.
a = os.popen("du -a|awk '{print $2}'|grep '.*.pdf$'").read()[2:-1]
print(a)
On my computer the output was:
[ tmp]$ python3 forum.py
a.pdf
./foo/test.pdf
You can just do something like
for line in a.split('
'):
print(line, line.split('/'))
and you'll know the folder of the pdf. I hope I helped you