development (#21)

* add logging

* Formatted with psf/black

* sets example

* call external command

* contains

* Formatted with psf/black

* to integer

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Author: realDuYuanChao

basics/call_external_command.py

@@ -0,0 +1,11 @@
+def main() -> None:
+    """
+    >>> import subprocess
+    >>> _ = subprocess.run(["ls", "-l"])
+    """
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()

basics/log_example.py

@@ -0,0 +1,12 @@
+def main() -> None:
+    import logging
+
+    logging.debug("Debugging information")
+    logging.info("Informational message")
+    logging.warning("Warning:config file %s not found", "server.conf")
+    logging.error("Error occurred")
+    logging.critical("Critical error -- shutting down")
+
+
+if __name__ == "__main__":
+    main()

basics/sets_example.py

@@ -0,0 +1,18 @@
+def main() -> None:
+    """
+    >>> languages = {"Python", "Java", "C", "JavaScript", "Python", "C"}
+    >>> len(languages)
+    4
+    >>> "Java" in languages
+    True
+    >>> "Python" in languages
+    True
+    >>> "c" in languages
+    False
+    """
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()

maths/to_integer.py

@@ -0,0 +1,22 @@
+def to_integer(number_str: str) -> int:
+    """
+    >>> to_integer("123")
+    123
+    >>> to_integer("3.14")
+    3
+    >>> to_integer("-123")
+    -123
+    >>> to_integer("-3.14")
+    -3
+    >>> to_integer("123a")
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: '123a'
+    """
+    return int(float(number_str))
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()

strings/contains.py

@@ -0,0 +1,20 @@
+def contains(main_str: str, sub_str: str) -> bool:
+    """
+    >>> "a" in "abc"
+    True
+    >>> "bc" in "abc"
+    True
+    >>> "ac" in "abc"
+    False
+    >>> "" in "abc"
+    True
+    >>> "" in ""
+    True
+    """
+    return sub_str in main_str
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()