Whatiskeptiname

Program's_Contributed_By_Contributors/Python_Programs/regex_date_validator.py

@@ -0,0 +1,11 @@
+import re  # import regex module
+
+# check if date is valid (yyyy-mm-dd)
+def date_validation(self, date):
+    if re.fullmatch(r"/^\d{4}-\d{2}-\d{2}$/", date):
+        return True
+    else:
+        return False
+
+
+date_validation("2022-02-29")  # False/True

Program's_Contributed_By_Contributors/Python_Programs/regex_split_string.py

@@ -0,0 +1,12 @@
+import re  # import reges module
+
+string = "sixteen:16 Eighty three:83."
+pattern = "\d+"
+
+def split_string(pattern, string)
+    result = re.split(pattern, string)
+    return result
+
+print(split_string(pattern, string))
+
+# Output: ['sixteen:', ' Eighty three:', '.']

Program's_Contributed_By_Contributors/Python_Programs/regex_string_compare.py

@@ -1,16 +1,13 @@
-# simple string matching and other normal validation using regular expressions
+# check if the string matches with the given pattern
 
 import re  # import regular expression module
 
-# class for regex snippets
-class regex:
-    def __init__(self) -> None:
-        pass
+# Matching string
+def str_match(pattern, string):
+    if re.search(pattern, string):
+        return True
+    else:
+        return False
 
-    # Matching string
-    def str_match(self, pattern, string):
-        if re.search(pattern, string):
-            return True
-        else:
-            return False
 
+str_match("[a-z]", "a")  # True/False

Program's_Contributed_By_Contributors/Python_Programs/regex_username_validation.py

@@ -0,0 +1,12 @@
+import re  # import regex module
+
+
+# check if the username is valid
+def username_validation(self, username):
+    if re.fullmatch(r"^(?=[a-zA-Z0-9._]{8,20}$)(?!.*[_.]{2})[^_.].*[^_.]$", username):
+        return True
+    else:
+        return False
+
+
+username_validation("youlot44")  # True/False

Program's_Contributed_By_Contributors/Python_Programs/timer.py

@@ -0,0 +1,16 @@
+# Countdown timer
+import time  # import time
+
+
+def countdown(time_sec):
+    while time_sec:
+        mins, secs = divmod(time_sec, 60)
+        timeformat = "{:02d}:{:02d}".format(mins, secs)
+        print(timeformat, end="\r")
+        time.sleep(1)
+        time_sec -= 1
+
+    print("stop")
+
+
+countdown(5)