Add tool for count the number of characters in a tex tile.

README.md

@@ -8,6 +8,8 @@ A collection of [Python](https://www.python.org) utilities and tools.
 
 - [calculate_age.py](https://github.com/lucasayres/python-tools/blob/master/tools/calculate_age.py) - Calculate age from date of birth.
 
+- [count_characters.py](https://github.com/lucasayres/python-tools/blob/master/tools/count_characters.py) - Count the number of characters in a text file.
+
 - [email_web_crawler.py](https://github.com/lucasayres/python-tools/blob/master/tools/email_web_crawler.py) - Web crawler for grabbing emails from a website.
 
 - [merge_pdfs.py](https://github.com/lucasayres/python-tools/blob/master/tools/merge_pdfs.py) - Combine multiple pdfs to single pdf.

tools/count_characters.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+def count_characters(file):
+    """Count the number of characters in a text file.
+
+    Args:
+        file (str): Path of a fext file.
+
+    Returns:
+        int: Return number of characters in a text file.
+
+    """
+    with open(file) as f:
+        lines = f.readlines()
+    return len(''.join([l for l in lines]))