Create Exercise-23-File-Overlap.py

Author: swsoyee

Exercise-23-File-Overlap.py

@@ -0,0 +1,36 @@
+'''
+Exercise 23: File Overlap
+
+Given two .txt files that have lists of numbers in them, find the
+numbers that are overlapping. One .txt file has a list of all prime
+numbers under 1000, and the other .txt file has a list of happy
+numbers up to 1000.
+
+'''
+# Solution
+def read_file(filename):
+    """
+    Read a text file and store all lines into a list.
+    
+    Arguments:
+    filename -- file name.
+    
+    Returns:
+    lines -- a list contain all lines in the file.
+    """
+    with open(filename, 'r') as open_file:
+        lines = open_file.read().splitlines()
+    return lines
+
+def main():
+    file1 = map(int, read_file('primenumbers.txt'))
+    file2 = map(int, read_file('happynumbers.txt'))
+    overlap = list(set(file1) & set(file2))
+    print(sorted(overlap))
+        
+if __name__ == "__main__":
+    main()
+
+# Test Part
+# >>> %Run test.py
+# [7, 13, 19, 23, 31, 79, 97, 103, 109, 139, 167, 193, 239, 263, 293, 313, 331, 367, 379, 383, 397, 409, 487, 563, 617, 653, 673, 683, 709, 739, 761, 863, 881, 907, 937]