Filter, change of display form of variables
1. Form: lowercase
{{ name | lower }}
2. Concatenation: first escape the text to HTML, and then convert each line to
tag
{{ my_text|escape|linebreaks }}
3. Filter parameters
Display the first 30 words
{{ bio | truncatewords: "30" }}
Formatting
{{ pub_date | date: "F j, Y" }}
Filter list
{{ 123|add: "5" }} Add a value to value
{{ "AB'CD"|addslashes }} Single quotes plus escape marks are generally used for output to javascript
{{ "abcd"|capfirst }} The first letter is capitalized
{{ "abcd"|center:"50" }} Output specification The length of the string and center the value
{{ "123spam456spam789"|cut:"spam" }} Find and delete the specified string
{{ value|date:"F j, Y" }} Format the date
{{ value|default:"(N/A)" }} If the value does not exist, use the specified value
{{ value|default_if_none:"(N/A)" }} If the value is None, use the specified value
{ {List variable|dictsort:"Number"}} Sort from small to large
{{ List variable|dictsortreversed:"Number" }} Sort from large to small
{% if 92|pisibleby:"2" %} Determine whether Divides the specified number
{{ string|escape }} and converts it to html entity
{{ 21984124|filesizeformat }} Using 1024 as the base, calculates the maximum value, retaining 1 decimal place, increasing readability
{{ list|first }} Return the first element of the list
{{ "ik23hr&jqwh"|fix_ampersands }} & Convert to &
{{ 13.414121241|floatformat }} Retain 1 decimal place, can be a negative number, several forms
{{ 13.414121241| floatformat: "2" }} Keep 2 decimal places
{{ 23456 |get_digit: "1" }} Intercept a number at the specified position starting from the single digit
{{ list|join: ", " }} Use Specify the delimiter to connect the list
{{ list|length }} Return the number of lists
{% if list|length_is: "3" %} Whether the number of lists specifies a value
{{ "ABCD"|linebreaks }} Use New lines are marked with
,
wrapped
{{ "ABCD"|linebreaksbr }} New lines are marked with
wrapped
{{ variable|linenumbers }} Add line number to each line in the variable
{{ "abcd "|ljust:"50" }} Align the string to the left in the specified width, fill the rest with spaces
{{ "ABCD"|lower }} lowercase
{% for i in "1abc1"|make_list %}ABCDE ,{% endfor %} Use the number of characters in a string or number as a list
{{ "abcdefghijklmnopqrstuvwxyz"|phone2numeric }} Convert characters into corresponding numbers? ?
{{ list or number | pluralize }} The plural form of the word, if the number of strings in the list is greater than 1, return s, otherwise return an empty string
{{ list or number | pluralize: "es" }} Specify es
{{ list or number|pluralize:"y,ies" }} Specifies that ies is replaced by y
{{ object|pprint }} displays the value of an object
{{ list|random }} returns a random item in the list
{{ string|removetags:"br p p" }} Delete the specified html tag in the string
{{ string|rjust: "50" }} Align the string to the right in the specified width, and fill the rest with spaces
{{ list|slice:":2" }} Slice
{{ string|slugify }} The minus sign and underscore are left in the string, other symbols are deleted, and spaces are replaced with minus signs
{{ 3|stringformat:" 02i" }} String format, using Python's string format syntax
{{ "EABD"|striptags }} to strip [X]HTML syntax tags
{{ time variable|time:"P" }} date Time part format
{{ datetime|timesince }} How much time has passed since the given date until now
{{ datetime|timesince:"other_datetime" }} How much time has passed between two days
{{ datetime|timeuntil }} How much time has elapsed since a given date? The difference from the above is the position before and after the 2 dates.
{{ datetime|timeuntil:"other_datetime" }} How much time has passed between two days
{{ "abdsadf"|title }} capitalized
{{ "A B C D E F" | truncatewords: "3" }} intercepted Specify the number of words
{{ "111221"|truncatewords_html:"2" }} Intercept the specified number of html tags and complete them
{{ list|unordered_list }}
Multiple embeddings The set list is displayed as an unordered list of html
{{ string|upper }} All caps
linkage url encoding
{{ string|urlize }} Convert URLs from plain text to clickable links. (No experiment was successful)
{{ string|urlizetrunc: "30" }} Same as above, multiple intercepted character numbers. (Similarly no experiment was successful)
{{ "B C D E F"|wordcount }} Number of words
{{ "a b c d e f g h i j k"|wordwrap: "5" }} Insert carriage return characters after every specified number of characters
{{ boolean| yesno:"Yes,No,Perhaps" }} The return string for three values, corresponding to non-empty, empty, None

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Useanarray.arrayoveralistinPythonwhendealingwithhomogeneousdata,performance-criticalcode,orinterfacingwithCcode.1)HomogeneousData:Arrayssavememorywithtypedelements.2)Performance-CriticalCode:Arraysofferbetterperformancefornumericaloperations.3)Interf

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