Day 2a

day2a.py

+import re
+
+def checkpw(a, b, l, pw):
+    print(a, b, l, pw)
+    c = pw.count(l)
+    if a <= c <= b:
+        return True
+    return False
+
+def main():
+    patt = re.compile("^(\d+)-(\d+) (.): (.+)$")
+    with open("input2.txt") as file:
+        lines = file.readlines()
+    ln = []
+    for line in lines:
+        m = re.match(patt, line)
+        ln.append([int(m.group(1)), int(m.group(2)), m.group(3), m.group(4)])
+    valid = [pw for pw in ln if checkpw(pw[0], pw[1], pw[2], pw[3])]
+    print(f"There are {len(valid)} valid passwords out of {len(ln)}.")
+
+
+if __name__ == "__main__":
+    main()