TheDeveloperBlog.com

Home | Contact Us

C-Sharp | Java | Python | Swift | GO | WPF | Ruby | Scala | F# | JavaScript | SQL | PHP | Angular | HTML

<< Back to PYTHON

Python iter Example: next

Use the iter built-in and the next method. Iter is used in for-loops.
Iter. This built-in is used to create custom looping logic. We can use iter in a for-loop. We continue looping while values are returned by iter.Built-ins
Example, two arguments. With two arguments, iter continually calls the method passed as argument 1. It stops when the second argument, a value, is reached.

Here: We loop over random elements from the list until a None element value is reached.

Deffor
Python program that uses iter import random elements = ["cat", "dog", "horse", None, "gerbil"] def random_element(): # Return random element from list. return random.choice(elements) # Use iter until a None element is returned. for element in iter(random_element, None): print(element) Output cat horse dog dog gerbil
Example, one argument. Here iter does something different. It acts upon a collection and returns each element in order. This usage is not often needed—we can just reference the collection.
Python program that uses iter, single argument elements = ["cat", "dog", "horse", None, "gerbil"] # Iter returns each element, one after another. for element in iter(elements): print(element) Output cat dog horse None gerbil
Iter, next method. With iter we get an iterator variable. We must call next() on this iterator to use it. Here I call next() to get successive values from a list—no loop is needed.
Python program that uses next values = [1, 10, 100, 1000] i = iter(values) # Call the next built-in on an iter. # ... This style of code is not often useful. value = next(i) print(value) value = next(i) print(value) value = next(i) print(value) Output 1 10 100
A summary. With iter we can create custom logic in for-loops. We can invoke next() to get the next element from the iterator in a statement.
© TheDeveloperBlog.com
The Dev Codes

Related Links:

.Net

.NET Array Dictionary List String 2D Async DataTable Dates DateTime Enum File For Foreach Format IEnumerable If IndexOf Lambda LINQ Parse Path Process Property Regex Replace Sort Split Static StringBuilder Substring Switch Tuple

Java

Core Array ArrayList HashMap String 2D Cast Character Console Deque Duplicates File For Format HashSet If IndexOf Lambda Math ParseInt Process Random Regex Replace Sort Split StringBuilder Substring Switch Vector While

Related Links

Adjectives Ado Ai Android Angular Antonyms Apache Articles Asp Autocad Automata Aws Azure Basic Binary Bitcoin Blockchain C Cassandra Change Coa Computer Control Cpp Create Creating C-Sharp Cyber Daa Data Dbms Deletion Devops Difference Discrete Es6 Ethical Examples Features Firebase Flutter Fs Git Go Hbase History Hive Hiveql How Html Idioms Insertion Installing Ios Java Joomla Js Kafka Kali Laravel Logical Machine Matlab Matrix Mongodb Mysql One Opencv Oracle Ordering Os Pandas Php Pig Pl Postgresql Powershell Prepositions Program Python React Ruby Scala Selecting Selenium Sentence Seo Sharepoint Software Spellings Spotting Spring Sql Sqlite Sqoop Svn Swift Synonyms Talend Testng Types Uml Unity Vbnet Verbal Webdriver What Wpf