norminette

d00/ex00/Hello.py

@@ -1,7 +1,9 @@
 ft_list = ["Hello", "tata!"]
 ft_tuple = ("Hello", "toto!")
 ft_set = {"Hello", "tutu!"}
-ft_dict = {"Hello" : "titi!"}
+ft_dict = {"Hello": "titi!"}
+
+# doc : https://docs.python.org/3.10/tutorial/datastructures.html
 
 # ft_list
 ft_list.append("World" + ft_list[1][-1])
@@ -10,8 +12,8 @@ ft_list.pop(1)
 # ft_tuple
 ft_tuple = ft_tuple[0], "France!"
 
-# ft_set
-# ft_set = "{'Hello', 'Paris!'}" # mouhaha
+# ft_set, symetric difference :
+# https://docs.python.org/3.10/library/stdtypes.html#frozenset.symmetric_difference
 ft_set ^= {"tutu!", "Paris!"}
 
 # ft_dict
@@ -19,5 +21,5 @@ ft_dict["Hello"] = "42Paris!"
 
 print(ft_list)
 print(ft_tuple)
-print(ft_set)
-print(ft_dict)
+print(ft_set)  # set is unordered, so output order is hasardous
+print(ft_dict)

d00/ex01/format_ft_time.py

@@ -1,16 +1,29 @@
 import datetime as dt
+import time as tm
 
 # https://docs.python.org/3.10/library/datetime.html?highlight=time#datetime.datetime
 now = dt.datetime.now()
-epoch = dt.datetime(1970, 1, 1)
+
+# # for memory
+# epoch = dt.datetime(1970, 1, 1)
+# delta = now - epoch
+# deltaInSeconds = delta.total_seconds()
 
 # https://docs.python.org/3.10/library/datetime.html?highlight=time#strftime-and-strptime-behavior
-formatDate = now.strftime("%b %d %Y")
+format_date = now.strftime("%b %d %Y")
 
-delta = now - epoch
+epoch_delta_in_seconds = tm.time()
 
-deltaInSeconds = delta.total_seconds()
-deltaInSecondsStr = "{:,.3f}".format(float(deltaInSeconds))
-deltaInScientificStr = "{:.2e}".format(float(deltaInSeconds))
+# str.format https://docs.python.org/3.10/library/string.html#formatstrings
+epoch_delta_in_seconds_str = "{:,.4f}".format(epoch_delta_in_seconds)
+epoch_delta_in_scientific_str = "{:.2e}".format(epoch_delta_in_seconds)
 
-print("Seconds since January 1, 1970: " + deltaInSecondsStr + " or " + deltaInScientificStr + " in scientific notation\n" + formatDate)
+print(
+    "Seconds since January 1, 1970: ",
+    epoch_delta_in_seconds_str,
+    " or ",
+    epoch_delta_in_scientific_str,
+    " in scientific notation\n",
+    format_date,
+    sep=""
+)

d00/ex02/find_ft_type.py

@@ -4,7 +4,8 @@ def all_thing_is_obj(object: any) -> int:
 
     # https://docs.python.org/3.10/tutorial/controlflow.html#match-statements
     match object:
-        # class patterm : check against a class (check if instance when empty arguments) https://docs.python.org/3/reference/compound_stmts.html#class-patterns
+        # class pattern, against a class (or instance if empty arguments):
+        # https://docs.python.org/3/reference/compound_stmts.html#class-patterns
         case list():
             print("List : ", ofType)
         case tuple():
@@ -17,4 +18,4 @@ def all_thing_is_obj(object: any) -> int:
             print(object + " is in the kitchen : ", ofType)
         case _:
             print("Type not found")
-    return 42
+    return 42

d00/ex02/tester.py

@@ -3,7 +3,7 @@ from find_ft_type import all_thing_is_obj
 ft_list = ["Hello", "tata!"]
 ft_tuple = ("Hello", "toto!")
 ft_set = {"Hello", "tutu!"}
-ft_dict = {"Hello" : "titi!"}
+ft_dict = {"Hello": "titi!"}
 
 all_thing_is_obj(ft_list)
 all_thing_is_obj(ft_tuple)
@@ -11,4 +11,4 @@ all_thing_is_obj(ft_set)
 all_thing_is_obj(ft_dict)
 all_thing_is_obj("Brian")
 all_thing_is_obj("Toto")
-print(all_thing_is_obj(10))
+print(all_thing_is_obj(10))

d00/ex03/NULL_not_found.py

@@ -4,18 +4,25 @@ def NULL_not_found(object: any) -> int:
     match object:
         case None:
             print("Nothing:", object, nullType)
-        # using a guard https://docs.python.org/3/reference/compound_stmts.html#guards
-        # (NaN == NaN) = false https://docs.python.org/3.10/reference/expressions.html#value-comparisons "A counter-intuitive implication is that not-a-number values are not equal to themselves"
+
+        # using a guard :
+        # https://docs.python.org/3/reference/compound_stmts.html#guards
+        # (NaN == NaN) = false :
+        # https://docs.python.org/3.10/reference/expressions.html#value-comparisons
+        # "A counter-intuitive implication is that not-a-number values are not
+        #  equal to themselves"
+
         case float() if object != object:
             print("Cheese:", object, nullType)
-        case bool() if object == False :
+        # need check before int(), why ?
+        case bool() if object is False:
             print("Fake:", object, nullType)
-        case int() if object == 0 :
+        case int() if object == 0:
             print("Zero:", object, nullType)
-        case str() if object == '' :
-            print("Empty:", object, nullType)
+        case str() if object == '':
+            print("Empty:", nullType)
         case _:
             print("Type not Found")
             return 1
-    
-    return 0
+
+    return 0

d00/ex03/tester.py

@@ -4,7 +4,7 @@ Nothing = None
 Garlic = float("NaN")
 Garlic2 = float("2")
 Zero = 0
-Empty = '' # ’’
+Empty = ''  # ’’
 Fake = False
 Right = True
 
@@ -18,4 +18,4 @@ print(NULL_not_found("Brian"))
 print("--")
 NULL_not_found(Garlic2)
 NULL_not_found(Right)
-print(NULL_not_found(""))
+print(NULL_not_found(""))

d00/ex04/whatis.py

@@ -0,0 +1,27 @@
+def check_parity(args: list[str]):
+    if len(args) == 0:
+        return
+    if len(args) > 1:
+        print("AssertionError: more than one argument is provided")
+        return
+
+    arg = args[0]
+    # https://docs.python.org/3.10/tutorial/errors.html
+    try:
+        number = int(arg)
+    except ValueError:
+        print("AssertionError: argument is not an integer")
+        return
+
+    if number % 2 == 0:
+        print("I'm Even.")
+    else:
+        print("I'm Odd.")
+
+
+# execute module as a script :
+# https://docs.python.org/3.10/tutorial/modules.html#executing-modules-as-scripts
+if __name__ == "__main__":
+    # https://docs.python.org/3.10/library/sys.html
+    import sys
+    check_parity(sys.argv[1:])

d00/ex05/building.py

@@ -0,0 +1,55 @@
+def get_message(argv: list[str]) -> str:
+    """check arguments and return string"""
+
+    # https://docs.python.org/3.10/reference/simple_stmts.html?highlight=assert#the-assert-statement
+    assert len(argv) < 3, "too much arguments"
+
+    if len(argv) == 2:
+        return argv[1]
+
+    # stdin https://docs.python.org/3/library/sys.html#sys.stdin
+    print("What is the text to count?")
+    msg = sys.stdin.readline(424242)
+    return msg
+
+
+def main(argv: list[str]):
+    """displays stats on string"""
+
+    try:
+        msg = get_message(argv)
+    except AssertionError as err:
+        print("AssertionError:", err)
+        return
+
+    char_count = len(msg)
+    print("The text contains", char_count, "characters:")
+
+    # filter() https://docs.python.org/3.10/library/functions.html#filter
+    upper_count = len(list(filter(str.isupper, msg)))
+    print(upper_count, "upper letters")
+
+    # generator expressions
+    # https://docs.python.org/3.10/reference/expressions.html#generator-expressions
+    lower_count = sum(1 for char in msg if char.islower())
+    print(lower_count, "lower letters")
+
+    # in https://docs.python.org/3/reference/expressions.html#in
+    punctuation = r"""!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~"""
+    punctuation_count = sum(1 for char in msg if char in punctuation)
+    print(punctuation_count, "punctuation marks")
+
+    # array.count()
+    # https://docs.python.org/3.10/library/array.html?highlight=count#array.array.count
+    space_count = msg.count(" ") + msg.count("\n")
+    print(space_count, "spaces")
+
+    # list comprehension
+    # https://docs.python.org/3.10/tutorial/datastructures.html#list-comprehensions
+    digits_count = len([char for char in msg if char.isdigit()])
+    print(digits_count, "digits")
+
+
+if __name__ == "__main__":
+    import sys
+    main(sys.argv)

d00/ex06/filterstring.py

@@ -0,0 +1,39 @@
+def get_args(argv: list[str]) -> dict[str, int]:
+    """check and return arguments"""
+
+    error_msg = "the arguments are bad"
+
+    assert len(argv) == 3, error_msg
+
+    try:
+        msg_len = int(argv[2])
+    except ValueError:
+        raise AssertionError(error_msg)
+
+    return {"text": argv[1], "len": msg_len}
+
+
+def main(argv: list[str]):
+    """filter small words in string"""
+
+    try:
+        args = get_args(argv)
+    except AssertionError as err:
+        print("AssertionError:", err)
+        return
+
+    text = args["text"]
+    maxlen = args["len"]
+
+    print(text.split())
+
+    words = [word for word in text.split()]  # mouhaha
+
+    filter_words = list(ft_filter(lambda word: len(word) > maxlen, words))
+    print(filter_words)
+
+
+if __name__ == "__main__":
+    import sys
+    from ft_filter import ft_filter
+    main(sys.argv)

d00/ex06/ft_filter.py

@@ -0,0 +1,13 @@
+# filter https://docs.python.org/3.10/library/functions.html#filter
+def ft_filter(function, iterable):
+    """filter(function or None, iterable) --> filter object
+
+Return an iterator yielding those items of iterable for which function(item)
+is true. If function is None, return the items that are true."""
+
+    # iter
+    # https://docs.python.org/3.10/library/functions.html?highlight=iter#iter
+    if function is None:
+        return iter([item for item in iterable if item])
+    else:
+        return iter([item for item in iterable if function(item)])

d00/ex06/tester.py

@@ -0,0 +1,19 @@
+from ft_filter import ft_filter
+
+print("- 0 filter        :\n\n", filter.__doc__)
+print("\n    ft_filter     :\n\n", ft_filter.__doc__)
+print("")
+
+msg = "Hello World"
+
+print("- 1 filter        :", filter(None, msg))
+print("    ft_filter     :", ft_filter(None, msg))
+
+print("- 2 filter        :", filter(str.isupper, msg))
+print("    ft_filter     :", ft_filter(str.isupper, msg))
+
+print("- 3 filter        :", list(filter(None, msg)))
+print("    ft_filter     :", list(ft_filter(None, msg)))
+
+print("- 4 filter        :", list(filter(str.isupper, msg)))
+print("    ft_filter     :", list(ft_filter(str.isupper, msg)))