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python/python_notes.md

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+###### top
+## Python. Заметки на полях
+[Официальная документация](https://docs.python.org/3/)
+
+***
+
+[Базовые понятия](#part1)
+- [List comprehension](#chapter1)
+- [lambda](#chapter2)
+- [Ad-hoc команды](#chapter3)
+
+[Ansible playbook](#part2)
+- [Простой playbook](#chapter4)
+- [Переменные](#chapter5)
+- [Отладка](#chapter6)
+- [Блоки и обработка ошибок](#chapter7)
+- [Асинхронные задачи](#chapter8)
+- [](#chapter9)
+- [](#chapter10)
+- [](#chapter11)
+- [](#chapter12)
+
+***
+
+###### part1
+## Базовые понятия
+[вверх](#top)
+
+Интрерпретируемый язык
+
+###### Chapter1
+### List comprehension
+Представление списков, списковые включения  
+https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions
+
+```python
+list_square = [x ** 2 for x in range(5)]
+print(list_square)
+
+[0, 1, 4, 9, 16]
+```
+
+```python
+vlans = [f'vlan {num}' for num in range(10, 16)]
+print(vlans)
+
+['vlan 10', 'vlan 11', 'vlan 12', 'vlan 13', 'vlan 14', 'vlan 15']
+```
+
+```python
+prices = [98, 123, 13, 45, 67, 43, 87]
+
+less = [x for x in prices if x < 100]
+print(less)
+
+[98, 13, 45, 67, 43, 87]
+```
+
+```python
+vlans = [100, 110, 150, 200]
+names = ['mngmt', 'voice', 'video', 'dmz']
+
+result = ['vlan {}\n name {}'.format(vlan, name) for vlan, name in zip(vlans, names)]
+
+print(result)
+
+['vlan 100\n name mngmt', 'vlan 110\n name voice', 'vlan 150\n name video', 'vlan 200\n name dmz']
+```
+
+```python
+users = [{'name': 'Иван', 'age': 29},
+         {'name': 'Андрей', 'age': 31},
+         {'name': 'Настя', 'age': 22},
+         {'name': 'Артём', 'age': 40}]
+
+users_list = [user['name'] for user in users if user['age'] > 30]
+print(users_list)
+
+['Андрей', 'Артём']
+```
+
+```python
+vlans = [[10, 21, 35], [101, 115, 150], [111, 40, 50]]
+
+result = [vlan for vlan_list in vlans for vlan in vlan_list]
+print(result)
+
+[10, 21, 35, 101, 115, 150, 111, 40, 50]
+```
+
+[вверх](#top)
+
+***
+
+### lambda
+
+
+```python
+list_square = [x ** 2 for x in range(5)]
+print(list_square)
+
+[0, 1, 4, 9, 16]
+```
+
+[вверх](#top)
+
+***