Информатика_2023_2024_Лекция_3

1.

Информатика
для втузов
Лекция №3. Тема: «Современные языки программирования.
Python. Основы регулярных выражений.»

2.

Статистика использования языков
https://www.tiobe.com/tiobe-index/

3.

Статистика использования языков (2)
Python:
September 2017 = 2,98%
September 2018 = 7,65%
September 2019 = 9,88%
September 2020 = 10,47%
September 2021 = 11,67%
September 2022 = 15,74%

6.

Установка
https://www.python.org/downloads/

7.

Установка(2)
Важно установить pip
для дальнейшего
подключения
пакетов/библиотек

10.

Environmnet Colab
Онлайн Jupiter для целей ML&DS
!pip — для
установки
библиотек
! — при
использовании
bash-скриптов

11.

Примеры команд
pip install --upgrade ipython jupyter
pip install jupyterlab
cd C:\Users\<USER_NAME>\AppData\Local\Programs\Python\Python37\Scripts
jupyter-notebook.exe

Полезные функции для работы со строками
capitalize()
casefold()
center()
Converts the first character to upper case
Converts string into lower case
Returns a centered string
Returns the number of times a specified value
occurs in a string
ljust()
lower()
lstrip()
encode()
Returns an encoded version of the string
partition()
endswith()
Returns true if the string ends with the specified
value
replace()
expandtabs()
Sets the tab size of the string
rfind()
count()
format()
Searches the string for a specified value and
returns the position of where it was found
Formats specified values in a string
format_map()
Formats specified values in a string
find()
index()
isalnum()
isalpha()
isdecimal()
Searches the string for a specified value and
returns the position of where it was found
Returns True if all characters in the string are
alphanumeric
Returns True if all characters in the string are in
the alphabet
Returns True if all characters in the string are
decimals
maketrans()
rindex()
rjust()
rpartition()
rsplit()
Returns a left justified version of the string
Converts a string into lower case
Returns a left trim version of the string
Returns a translation table to be used in
translations
Returns a tuple where the string is parted into three
parts
Returns a string where a specified value is replaced
with a specified value
Searches the string for a specified value and returns
the last position of where it was found
Searches the string for a specified value and returns
the last position of where it was found
Returns a right justified version of the string
Returns a tuple where the string is parted into three
parts
Splits the string at the specified separator, and
returns a list
rstrip()
Returns a right trim version of the string
split()
Splits the string at the specified separator, and
returns a list
splitlines()
Splits the string at line breaks and returns a list

23.

Полезные функции для работы со строками(2)
isdigit()
isidentifier()
islower()
isnumeric()
isprintable()
isspace()
istitle()
Returns True if all characters in the string are digits
startswith()
Returns True if the string is an identifier
strip()
Returns True if all characters in the string are lower
swapcase()
case
Returns True if all characters in the string are numeric title()
Returns True if all characters in the string are
translate()
printable
Returns True if all characters in the string are
upper()
whitespaces
Returns True if the string follows the rules of a title
Converts a string into upper case
Fills the string with a specified number of 0 values at
the beginning
ljust()
Returns a left justified version of the string
lower()
Converts a string into lower case
lstrip()
maketrans()
Returns a left trim version of the string
Returns a translation table to be used in translations
Returns a tuple where the string is parted into three
parts
Returns a string where a specified value is replaced
with a specified value
Searches the string for a specified value and returns the
last position of where it was found
Searches the string for a specified value and returns the
last position of where it was found
capitalize()
casefold()
center()
Returns a centered string
count()
Returns the number of times a specified value occurs
replace()
in a string
encode()
Returns an encoded version of the string
rfind()
endswith()
Returns true if the string ends with the specified
value
rindex()
join()
Returns a translated string
zfill()
Returns True if all characters in the string are upper
case
Joins the elements of an iterable to the end of the
string
Converts the first character to upper case
Converts string into lower case
isupper()
Returns true if the string starts with the specified value
Returns a trimmed version of the string
Swaps cases, lower case becomes upper case and vice
versa
Converts the first character of each word to upper case
partition()

24.

Полезные функции для работы со строками(3)
expandtabs()
Sets the tab size of the string
Searches the string for a specified value and
returns the position of where it was found
rjust()
format()
Formats specified values in a string
rsplit()
format_map()
Formats specified values in a string
Searches the string for a specified value and
returns the position of where it was found
rstrip()
find()
index()
rpartition()
split()
Returns a right justified version of the string
Returns a tuple where the string is parted into three
parts
Splits the string at the specified separator, and returns
a list
Returns a right trim version of the string
Splits the string at the specified separator, and returns
a list

25.

Дополнительные библиотеки и пакеты
По материалам Жумагулова Я.В.

26.

Дополнительные библиотеки и пакеты(2)

27.

Дополнительные библиотеки и пакеты(3)

28.

Дополнительные библиотеки и пакеты(4)
Pyqtgraph

29.

Полезные ссылки (2)
https://ru.wikiversity.org/wiki/Программирование_и_научные_вычисления_на_
языке_Python
https://realpython.com/ - Простые примеры
https://habr.com/post/352678/ - Установка и использование NumPy
https://www.lfd.uci.edu/~gohlke/pythonlibs/ - Набор готовых библиотек
https://tproger.ru/translations/jupyter-notebook-python-3/ - Командная оболочка
Jupyter для интерактивных вычислений
https://www.jetbrains.com/pycharm/ - Интегрированная среда разработки
https://books.ifmo.ru/file/pdf/2256.pdf - Методическое пособие Лямина А.В.