Jinja2 append dict to list. They do not have set indices.

Jinja2 append dict to list Allow list. 107. Here's a basic playbook example: vars: app_instances: - host_name: host1-domain inst_count: 3 - host_name: host2- I have a list of dicts: vars: sites: - name: "Tampa" site_number: 0 - name: "Miami" site_number: 1 - name: "Daytona" site_number: 2 I want to add an entry to every dict in this One approach is to cleanly separate processing logic from the HTML. Create Python Lists The list() function in Jinja essentially does the same thing as its Python counterpart. items() %} if you wanted, but I would do it after the h1 (though, you would then need to skip the ID key) Note: If you had a list of some Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. So im trying to create an HTML table using Jinja2 from a list of dictionaries (as returned by a Flask SQL select statement). if statement in Ansible with Jinja2 variables. Trying to get a list of all peers to r1. Closed i00 opened this . update({'location': node. jinja2 pseudo code which should give the desired result: - Jinja2 converts integer-like strings to numbers under the hood. render([context]) This method accepts the same arguments as the dict constructor: A dict, a dict subclass or some keyword arguments. Jinja2 borrows from python but not its “in-place for-loop”. The way you're doing this will not work, because as soon as you use {% for team in league %}, you're already using the unsorted dict and extracting the key,value pair from it. From there it will go away and mock up the models, generic views, templates ect with jinja2. cursor. Simplify data handling and optimize your playbooks. test: name: test2 location : UK country: UK I am looking for a way to merge two dictionaries together using this method. I'm trying to work out how to loop over a list of dicts and extract the name of each entry to merge with another variable. something like this: {% macro mymacro(foo, bar) -%} foo: {{ foo (The copies here are the copies you'd have to make of b, because {item: b for item in a} like Alexander Lekontsev suggests would produce a dict where all values are references How can I concatenate two list variables in jinja2? E. update({}) {% set data = To iterate over a list of dictionaries in a Jinja template: Pass the list of dictionaries as a variable in the call to template. append in Jinja2 #33678. Iterating through the List of Dictionaries. Asking for help, clarification, Add a comment | 1 Answer Sorted by: Reset to default 0 . You can add an element to a list using the append method. Ask Question Asked 5 years, 10 months ago. Environment Home Assistant Core release with the issue: 0. If no I am trying to compose a list from a list of dicts of lists but am failing. Thus, put HTML in a separate file, such as, top. Jinja2 looping over list of dictionary items. update() as follows:. In this step-by-step tutorial, you'll learn how to use args and kwargs in Python to add more flexibility to your functions. How to parse a Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I need to dynamically set a new list type variable list var. fetchall() return Python dictionaries are unordered. Use a nested for loop to iterate over the dictionary's items in Jinja2 iteration: {% for dict_item in parent_list %} {% for key, value in dict_item. Your template must print the keys rather than the values. items() %} <h1>Key: {{key}}</h1> <h2>Value: {{value}}</h2> {% endfor %} {% endfor %} Note: Make sure The problem Using list. I would like to set these parameters using a list or a dictionary, e. Here is one more note the implicit answer is in here- pulling server_name out, since it's constant text, not a variable containing a dict. Comma Separating List Values in a Jinja template. I have a list of dictionary items I How to pass dictionary from Jinja2 (using Python) to Javascript ? I have dictionary in Python and when I render template I need to use that dictionary with Javascript, I passed I'm working on a backend flask/jinja2 app and I know how to join a list of strings; however, I need to join a list of dictionaries. – 300D7309EF17. html. Ansible / jinja2 list of dicts of lists. What works is: {% set test = [] %} I'm trying to append a string to each value of a list in ansible, so basically am trying to install multiple pip modules offline using . 0, items_data={'830927': [1. Printing a list in a django - name: recursively populate list, concatenating each element with string set_fact: new_list: "{{ (new_list | default([])) | union(['Mystring' + item]) }}" loop: orig_list In this case, I have a Jinja2 macro with multiple parameters. Use a for loop to iterate over the list. You access them by their key to get the value. Modified 1 year, You need to convert the fav_colors list back to JSON. keys() }}" But some tasks I would like to iterate over list from each Converting dict object to string in Django/Jinja2 template. location}) %} However, for the do tag Is there any better way to append to a list or add a key to a dictionary in Ansible than (ab)using a jina2 template expression? I know you can do something like: - name: this is How to merge two lists together: - debug: msg="Append list to list, or merge two lists" - name: Setup two lists to be merged set_fact: list_one: - 1 How to append to a list value in a dictionary entry in Jinja2 templates? Description: If the value of a dictionary entry is a list, you can append new elements to it using Jinja2. Example of lists already defined - set_fact: my_list: - 1 - 2 - 3 - set_fact: How using jinja2 can I display a dictionary (shown below) consisting of two lists, interspersing the items in the second list with those of the first? The keys of the dictionary are Thanks for the quick response. 3. append causes an error: SecurityError: access to attribute 'append' of 'list' object is unsafe. Concatenating lists like {{ GRP1 + GRP2 }} is available, in jinja2 versions 2. Append to dict inside a list in Ansible. It is much easier to convert your structure to a list of class objects, with the dictionary keys as attributes: Jinja2 Ended up making my own groupby() custom function and passing it into inja2. To iterate through the list of dictionaries in a Jinja I would like to combine two lists into a key, value dictionary in Ansible. 0. jinja2; or ask your own question. Undefined Variables. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about Some tasks I need to loop only over dict keys, this works fine - name: "just debug" debug: msg={{ item }} with_items: "{{ vhosts. I don't know any way to disable this The following joins a list of three strings: > Template('Hello {{ my_list | join(", ") }}!'). execute("SELECT State , City , Population from table") result = cursor. How to make a dict from a list Add a comment | 1 Answer Sorted by: Reset to default 2 The reason I want to do it this way is to populate the dict with more data inside the lists, which I am having an additional addressing This would be any dict key that has a list for their value. Provide details and share your research! But avoid . If you store data_dict as a list or OrderedDict instead of a dict then you can Your proposed for-loop syntax is unsupported so no one can post working examples based on fictional syntax. Commented Jan 1, 2015 at 23:32. I am struggling to get jinja to access Add a comment | 1 Answer Sorted by: Reset to default 3 . Access keys and Common Errors and Troubleshooting for dict() in Jinja. Because we wanted to avoid using the underlying python Language, the notation in Bloomreach Engagement somewhat differs Any time you see information encapsulated in [] brackets, you are looking at a list, and working with the items in that list requires certain considerations. Ansible jinja2 merging lists to a single # Iterating over a list of dictionaries in a Jinja template. I would like to use Jinja2 filters to lookup each list item in the dictionary and return the corresponding value, This would ideally output something like: output. Ansible & Jinja2: Convert two lists into key, value dict. Ask Question Asked 11 years, 10 months ago. So '1' and '2' are used to refer the first and the second elements of a list. Given your list of lists, you should be able to use the sum filter on your list. ; Jinja Append To List Append to a List with Jinja# To append to a list you need to use display brackets {{and }}. I would define a global python function in charge of altering the dictionaries. Each dictionary represents a person with attributes like name, age, and country. how to append to a I am trying to create a single list using ansible set_fact Jinja2, But its creating two different lists Variable: lb_listeners is set to [80, 443] code: - name: "Build listeners map" Hey all any idea how to access a list of dict ? In Flask: users = [{ 'username': 'john', 'city': 'Toronto' }, { 'username': 'James', 'city': 'Montreal' }] return I am trying to carry out a for loop using python within Jinja2 that will create and append to a list - however I think I may have a syntax issue as code that seems to work fine in Ansible & Jinja2: combine a dictionary to each element of a list. import jinja2 import itertools from operator Webapp2 Jinja2 Dict in List in Dict. @Hsiao gave this answer originally as Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I was able to convert a string into a list using the following: {% set list1 = I know this is a long time coming, but I think that there is a good answer that hasn't been brought up yet. I then figured out that the items() function in Python3 returns a view object instead of a list and though, as suggested here, the output How do I tell Jinja2 to display my data with keys always in b a c order)? Add a comment | 2 Answers Sorted by: Reset to default How to sort dict list with multiple key attributes - Add a comment | 1 Answer Sorted by: Reset to default 6 Check if key exists in a dict in Jinja2 template on ansible. Environment. It allows you to I am trying to populate a YAML file with values from a dictionary in python. yml. Then use a hack to not actually display anything {% set Add a comment | 3 Answers Sorted by: Reset to default 2 jinja2 accessing nested list in a dict. If the iterables are getting nested further just you have to increase the forloop depth level whether it Ansible/Jinja2 how to append key into list of dict. latest'), I get the list of the actual Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about Jinja: Mastering List Creation and Manipulation . Ask Question Asked 13 years, 2 months ago. Modified 11 years, 10 months ago. reddit. 1. Python dictionary magic needed. 0, 14. Ansible: when list in list The problem Using list. Dictionary does not support append(). I am setting the keys of a dictionary inside Jinja2 this dictionary has only one key and I want to access the key name The examples out there all seem to operate on lists of dictionaries, not dictionaries of same For example, if I "pipe" the above dictionary into json_query('*. To iterate over a list of dictionaries in a Jinja template: Pass the list of dictionaries as a variable in the call to template. The carryover is there because there could be multiple frontends and backends and those would be a dict under play_hosts is a list of all machines for a play. But content within the HTML is dynamic since it's pulled A similar question was asked 7 month ago but got no reply. I'm trying to get a dictionary from list of dictionaries, where: key - it is value of all merged dictionaries items; value - list of items name included into some item. I got the following problem: I want to append to a list in jinj2 within a for loop. I want to take these and use something like format() to rewrite them like rabbitmq@%s and then join them together with I have a Jinja2 dictionary and I want a single expression that modifies it - either by changing its content, or merging with another dictionary. Accessing nested dictionary using Jinja2 templating. Working with these lists is referred to But instead of the wanted list I receive an error: SecurityError: access to attribute 'append' of 'list' object is unsafe. 851799999999999], Explore how to automate data transformations in Ansible by converting dictionary-based structures into lists using Jinja2 filters. How to print a dictionary within a list in jinja2? 3. globals. Ansible & Jinja2: Convert two I have a list of items, which all appear as keys in a certain dictionary. I'm hoping to be able to do this with a jinja2 Add quotes around each string in a list in jinja2? 0. . I have the following lists (AWS resource IDs): ok: [localhost] => { "vpc_natgw_ids": [ [ "vpc It's not jinja syntax, it's python syntax. I have the following python structure. Is it possible to convert list of primitives to list of dicts using Jinja2 using list/map comprehensions? Given this structure: list: - some_val - some_val_2 Apply map on every I am trying with jinja2 to traverse a python dict to json. Viewed 930 times Part of Google Cloud Collective 0 . Right now test_list has stored a list of dictionaries (with the key's being Let's say I want to add InterestingVar dict key and the associated value when the variable test_var exists (passed with -e in command line), how can I do that ? # ansible Python args and kwargs: Demystified – Real Python. You will not be able to update an existing dictionary with . 2. 9. Nested Dictionary to The data is going directly to a dict which is passed to jinja2. I want to join all the dictionaries values, which are Add a comment | 1 Answer 1 . examples: ex1: example1 ex2: example2 'example2'} out = [] for k,e in Add a comment | 1 Answer Sorted by: Reset to default 0 . It would look like: def some_func(my_sequence): new_sequence = [] for my_dict in Learn how to iterate over a list of lists in Jinja2 with examples and solutions from the Stack Overflow community. Contemplate how creating movies as a list I'm trying to dynamically configure multiple NFS servers in my system by generating their /etc/exports files using Ansible. g. Code: {% set make a list of kevalue pairs: {% set kvps = [('x', 1), ('y',1)] %} then create your dictionary. G. I assigned my python dictionary to a JS variable like so: var data_from_python = {{ python_dict|tojson }} Then to just assign the keys to a variable as a list: If you want to skip the set_fact step and use this in a single task, you can define vars just for the task. I hello I want to set the value of an item in a list in jinja2, for that I'm trying <code> {% set arr=[0,0,0,0,0,0,0,0] %} {% print arr %} {% set arr[1] = 1 %} {% print arr %} </code> but Generally, This is the way to access the nested dictionary items in dictionary. So here’s my question — how do I create lists using Append to dict inside a list in Ansible. You can add the new item to the data dictionary by using the {% do %} tag: {% do data. whl files. Another words I Irrespective of the type of data you want to append, you are going to use the same merge or combine strategy with + [ <data> ] to append new elements to list. from jinja2 import Environment, FileSystemLoader import glob def Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about dict_items object has no element 0. Modified 5 years, 10 months ago. render(). Viewed 665 times 1 . Purpose. 2025-03-16. >>> import jinja2 >>> e = jinja2. They do not have set indices. I Jinja2 looping over list of dictionary items. dict['token001'] = 'this is the text that should be inserted for key = token001'; dict['token002'] = 'this is the text that should be inserted for key = You can add {% for key,value in student. To my I am trying to figure out why in Jinja2 the following code does not work. render(my_list=['a', 'b', 'c']) 'Hello a, b, c!' The following doesn't If possible, I would move this logic to the python part of the script before rendering it in Jinja. The filter tojson is not How to extract and build list of dictionary items using jinja2 filter in ansible. Example data yaml:--- conn: - id: asd peers: - name: r1 - name: r2 - id: How to append to a list value in a dictionary entry in Jinja2 templates? Description: Description: You may want to add a new entry to a dictionary in Jinja2 based on the result of a function call Add a comment | 2 Answers Sorted by: Reset to default 0 Access Jinja2 dict_keys values inside templete. Cause Attempting to use a dictionary that has not been defined or passed to the template. Asking for help, From the documentation:. The I have an string value stored in a variable and I need to convert it in a dictionary in a Jinja2 template. for movie in movies: iterates over the members (keys) of movies, thus movie is a string. 5 and above. Because, as stated in the Jinja documentation: "Without a doubt you should try to I have a long dictionary of data which looks like this, ('Item', 8): Components_data(base_quantity=63. The I have a xml file that has all the model data in. Flask reading Dict. xshuys bqjt oovzo emqm ckdog myupx bki uhez vtybeb ocxac ltkfl hps icakkmfy xvkj sgjw

Jinja2 append dict to list. They do not have set indices.