I wonder if someone can help me. I'm trying to do something like the following to get input events from a HTML text box and send them to a python function.
textarea = cgi.FieldStorage()
chars = textarea.getvalue('1')
def MyPythonFunction():
'Do something with chars'
print(<textarea oninput=MyPythonFunction() </textarea>)
I've tried all kinds of things but can't get it to work.
Thanks in advance
First, the oninput keyword of the textarea HTML tag expects JavaScript code and would interpret mypythonfunction to be a JavaScript function. You need to output an HTML form that contains a SUBMIT tag such that when the form is submitted it invokes your server-side script: the form might look like:
<form name="f" action="my_script.py" method="post">
<textarea name="chars"></textarea>
<br>
<input type="submit" name="submit" value="Submit">
</form>
Your server side script, my_script.py, which must be executable, might look like:
#!/usr/bin/env python
import cgi
import cgitb
cgitb.enable()
form = cgi.FieldStorage()
chars = form.getvalue('chars')
If you really wanted to process input a character at a time, then you would remove the SUBMIT HTML tag, put back the oninput keyword. But then you would have to specify a JavaScript function that would get invoked whenever the contents of the textarea changed. This function would have to use a technique called AJAX to invoke your server-side Python script passing the contents of the TEXTAREA as an argument. This is a rather advanced topic, but you can investigate this.
Related
I'm trying to "develop" an application that stores todo tasks in a table. These tasks are organised like sub tasks for a "head" task.
The problem is that when submitting an input as a sub task via POST I need the name of the head-task as well. I can't figure out how to send the information have stored in my <h1>-label with the information I have in my <input>.
Here is my code example:
<h1>Taskheader</h1>
<form action="/todo/task/" method="post">
<input type="text" name="Taskitem">
<input type="submit" value="Submit" />
</form>
Is it possible to send this information off, without using overly complicated code for a beginner?
give the h1 an id for example id = "header-task-name" then get the h1 element by that id and get the input text both using javascript, finally send the task header and the input text using post and ajax to the server.
another approach is to wrap each task header and it's form in a div then get the parent div of the form using this :
var x = document.getElementById("the form").parentElement.nodeName;
then you can access the header of the form by using the parent div to get the h1 child
I'm sure that it's pretty easy, but I really can understand it.
I need to write a script with python. The script has to take a link and send this it to http://archive.org/web/, to be more precise the script has to put this link to form "Save page now":
<form id='wwmform_save' name="wwmform_save" method="get" action="#" onsubmit="if (''==$('#web_save_url').val()){$('#web_save_url').attr('placeholder', 'enter a web address')} else {document.location.href='//web.archive.org/save/'+$('#web_save_url').val();} return false;" style="display:inline;">
<input id='web_save_url' class="web_input web_text" type="text" name="url" placeholder="http://" />
<button id='web_save_button' type="submit" class="web_button web_text">SAVE PAGE</button>
</form>
And get an achieved link.
I would like to use the "Requests" library, but can't understan how.
Should I make a request first?
I think I use request.post but I don't realize what parameters I have to use.
Edited:
I did like n1c9 has written, it words and saves links but also I need the link where page was saved. When send request to http://web.archive.org/save/(link) it's loadind few seconds and then redirect to the needed link.
url = 'urlyouwanttoarchive.com'
archive = 'http://web.archive.org/save/'
requests.get(archive + url)
and if you want the URL to the newly archived page:
print(archive + url)
edit: if you had a list of URLs you wanted to archive, this would work too:
urls = ['url1.com','url2.com','url3.com','url4.com']
for i in urls:
requests.get(archive + i)
I have a small .py program, rendering 2 HTML pages. One of those HTML pages has a form in it. A basic form requesting a name, and a comment. I can not figure out how to take the name and the comment from the form and store it into the csv file. I have got the coding so that the very little I already manually input into the csv file is printed/returned on the HTML page, which is one of the goals. But I can't get the data I input into the form into the csv file, then back n the HTML page. I feel like this is a simple fix, but the Flask book makes absolutely no sense to me, I'm dyslexic and I find it impossible to make sense of the examples and the written explanations.
This is the code I have for reading the csv back onto the page;
#app.route('/guestbook')
def guestbook():
with open('nameList.csv','r') as inFile:
reader=csv.reader(inFile)
names=[row for row in reader]
return render_template('guestbook.html',names=names[1:])
And this is my form coding;
<h3 class="tab">Feel free to enter your comments below</h3>
<br />
<br />
<form action="" method="get" enctype="text/plain" name="Comments Form">
<input id="namebox" type="text" maxlength="45" size="32" placeholder="Name"
class="tab"/>
<br />
<textarea id="txt1" class="textbox tab" rows="6" placeholder="Your comment"
class="tab" cols="28"></textarea>
<br />
<button class="menuitem tab" onclick="clearComment()" class="tab">Clear
comment</button>
<button class="menuitem" onclick="saveComment()" class="tab">Save comment</button>
<br>
</div>
By what I understand all you need is to save the data into the file and you don't know how to handle this in Flask, I'll try to explain it with code as clear as possible:
# request is a part of Flask's HTTP requests
from flask import request
import csv
# methods is an array that's used in Flask which requests' methods are
# allowed to be performed in this route.
#app.route('/save-comment', methods=['POST'])
def save_comment():
# This is to make sure the HTTP method is POST and not any other
if request.method == 'POST':
# request.form is a dictionary that contains the form sent through
# the HTTP request. This work by getting the name="xxx" attribute of
# the html form field. So, if you want to get the name, your input
# should be something like this: <input type="text" name="name" />.
name = request.form['name']
comment = request.form['comment']
# This array is the fields your csv file has and in the following code
# you'll see how it will be used. Change it to your actual csv's fields.
fieldnames = ['name', 'comment']
# We repeat the same step as the reading, but with "w" to indicate
# the file is going to be written.
with open('nameList.csv','w') as inFile:
# DictWriter will help you write the file easily by treating the
# csv as a python's class and will allow you to work with
# dictionaries instead of having to add the csv manually.
writer = csv.DictWriter(inFile, fieldnames=fieldnames)
# writerow() will write a row in your csv file
writer.writerow({'name': name, 'comment': comment})
# And you return a text or a template, but if you don't return anything
# this code will never work.
return 'Thanks for your input!'
I'm trying to use Python and HTML together. What I'm trying to do is create an HTML Form that will submit data to a python file and that python file will then handle the data. But I'm not getting it to work.
Here is my python code:
form = cgi.FieldStorage() # instantiate only once!
name = form['Sample Name'].value
and this is my HTML code:
<form method='POST' action='/functionGen.py'>
Name: <input type='text' name='Sample Name'>
<input type='submit' value='Begin Storing'>
</form>
What ends up happening is I just see my python code in the browser, the file doesn't begin handling the data.
What can I do?
You should know, that you are getting plain python source document via http protocol now. If you want to use CGI mechanism, you should place youre .py in cgi-enabled directory. It means that you need http server.
related questions
How to run Python CGI script
How do I set up a Python CGI server?
I want user to enter a sentence then I break up that sentence into a list. I got the html page down but i have trouble passing that sentence to python.
How do I properly send the user input to be processed by python and output it to a new page?
There are many Python web frameworks. For example, to break up a sentence using bottle:
break-sentence.py:
#!/usr/bin/env python
from bottle import request, route, run, view
#route('/', method=['GET', 'POST'])
#view('form_template')
def index():
return dict(parts=request.forms.sentence.split(), # split on whitespace
show_form=request.method=='GET') # show form for get requests
run(host='localhost', port=8080)
And the template file form_template.tpl that is used both to show the form and the sentence parts after processing in Python (see index() function above):
<!DOCTYPE html>
<title>Break up sentence</title>
%if show_form:
<form action="/" method="post">
<label for="sentence">Input a sentence to break up</label>
<input type="text" name="sentence" />
</form>
%else:
Sentence parts:<ol>
%for part in parts:
<li> {{ part }}
%end
</ol>
%end
request.forms.sentence is used in Python to access user input from <input name="sentence"/> field.
To try it you could just download bottle.py and run:
$ python break-sentence.py
Bottle server starting up (using WSGIRefServer())...
Listening on http://localhost:8080/
Hit Ctrl-C to quit.
Now you can visit http://localhost:8080/.
Have you tried Google? This page sums up the possibilities, and is one of the first results when googling 'python html'.
As far as I know, the two easiest options for your problem are the following.
1) CGI scripting. You write a python script and configure it as a CGI-script (in case of most HTTP-servers by putting it in the cgi-bin/ folder). Next, you point to this file as the action-attribute of the form-tag in your HTML-file. The python-script will have access to all post-variables (and more), thus being able to process the input and write it as a HTML-file. Have a look at this page for a more extensive description. Googling for tutorials will give you easier step-by-step guides, such as this one.
2) Use Django. This is rather suited for larger projects, but giving it a try on this level may provide you certain insights, and wetting your appetite for future work ;)