Skip to content
Menu
e-lo [IT Engineer life]
  • Home
    • Note
  • Database
    • T-SQL
    • SQL Server quick
    • SQL server docs
    • MySql quick sheet
    • Postgre
    • InfluxDB
  • Programming
    • MS Azure Powershell
    • MS Azure Command-Line Interface (CLI) doc
    • Python Docs
    • Python Logging
    • Python-cheat-sheet
    • Git-guide
  • Azure
    • MS Windows virtual machines in Azure
    • MS ARM Docs
    • MS ARM Template Docs
    • MS ARM Functions
    • MS Bicep+ARM
    • MS ARM Tutorial
    • MS Deployment scripts (intern/extern)
    • MS Virtual Network
  • Az-nutshell
    • ms-technology-choices-compute-decision-tree
    • ms-data-store-decision-tree
    • ms-data-explorer
    • ms-storage-explorer
    • ms-azure-sql
    • ms-common-data-services
    • ms-azure-mysql-daas
    • ms-sla
    • az paas
    • az glossary-quicksheet
    • az-test-vm-script-quickguide
  • Linux
    • Top CMD’s
    • Useful CMD Linux
    • ss64 Linux
    • Ubuntu
    • 30 things Ubuntu 18.04
    • Bootable Ubuntu USB
    • LinuxFilesystemTreeOverview
  • Sys Admin
    • System Administrator
    • Sys News
  • Zen
    • Not thinking about anything is Zen
e-lo [IT Engineer life]

Python doc 3.4 Tuples and Sequences

Posted on August 5, 2018August 8, 2018 by espenk

https://docs.python.org/3.5/tutorial/datastructures.html

A tuple consists of a number of values separated by commas, for instance:

On output tuples are always enclosed in parentheses, so that nested tuples are interpreted correctly; they may be input with or without surrounding parentheses, although often parentheses are necessary anyway (if the tuple is part of a larger expression). It is not possible to assign to the individual items of a tuple, however it is possible to create tuples which contain mutable objects, such as lists.

Though tuples may seem similar to lists, they are often used in different situations and for different purposes. Tuples are immutable, and usually contain an heterogeneous sequence of elements that are accessed via unpacking (see later in this section) or indexing (or even by attribute in the case of namedtuples). Lists are mutable, and their elements are usually homogeneous and are accessed by iterating over the list.

Sets, Python also includes a data type for sets. A set is an unordered collection with no duplicate elements. Basic uses include membership testing and eliminating duplicate entries. Set objects also support mathematical operations like union, intersection, difference, and symmetric difference.

Curly braces or the set() function can be used to create sets. Note: to create an empty set you have to use set(), not {}; the latter creates an empty dictionary.

 

a # unique letters in a
a – b # letters in a but not in b
a | b # letters in either a or b
a & b # letters in both a and b
a ^ b # letters in a or b but not both

 

Add to a set:

RSS Azure

  • Scale your cloud-native apps and accelerate app modernization with Azure, the best cloud for your apps May 24, 2022

RSS RabbitMQ

  • RabbitMQ 3.8.15 release

RSS Python

  • PEP 691: JSON-based Simple API for Python Package Indexes May 4, 2022

Tags

5 min (26) Ansible (1) ARM (10) azure (40) cmd (3) Django (4) Docker (1) e-lo (2) Flask (2) Github (9) Grafana (2) Information (7) Information Retrieval (13) JAVA (1) kivy (2) Kotlin (6) linux (15) mobile (2) Natural Language Prossesing (NLP) (2) Net.Core (1) Networking and Security (6) OPC (2) PEP8 (1) Philosophy (3) Python (47) Python Networking and Security (5) Reason (2) RMQ (3) Solr (11) Sql (10) Uncategorized (2) VSC (1) Warframe (2) WMVARE (4) Zabbix (7)

Recent Posts

  • 5 min Logic App Storage Table
  • 5 min Logic App PSQL
  • 5 min Logic App
  • 5 MIN Azure Data Explorer
  • TODO Build a Hash Table in Python With TDD Real Python

Archives

Meta

  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org

Photo by Markus Spiske from Pexels "Matrix"

©2022 e-lo [IT Engineer life] | Powered by WordPress & Superb Themes