I'm trying to pass information to a python page via the url. I have the following link text:
"<a href='complete?id=%s'>" % (str(r[0]))
on the complete page, I have this:
import cgi
def complete():
form = cgi.FieldStorage()
db = MySQLdb.connect(user="", passwd="", db="todo")
c = db.cursor()
c.execute("delete from tasks where id =" + str(form["id"]))
return "<html><center>Task completed! Click <a href='/chris'>here</a> to go back!</center></html>"
The problem is that when i go to the complete page, i get a key error on "id". Does anyone know how to fix this?
EDIT
when i run cgi.test() it gives me nothing
I think something is wrong with the way i'm using the url because its not getting passed through.
its basically localhost/chris/complete?id=1
/chris/ is a folder and complete is a function within index.py
Am i formatting the url the wrong way?
The error means that form["id"] failed to find the key "id" in cgi.FieldStorage().
To test what keys are in the called URL, use cgi.test():
cgi.test()
Robust test CGI script, usable as main program. Writes minimal HTTP headers and formats all information provided to the script in HTML form.
EDIT: a basic test script (using the python cgi module with Linux path) is only 3 lines. Make sure you know how to run it on your system, then call it from a browser to check arguments are seen on the CGI side. You may also want to add traceback formatting with import cgitb; cgitb.enable().
#!/usr/bin/python
import cgi
cgi.test()
Have you tried printing out the value of form to make sure you're getting what you think you're getting? You do have a little problem with your code though... you should be doing form["id"].value to get the value of the item from FieldStorage. Another alternative is to just do it yourself, like so:
import os
import cgi
query_string = os.environ.get("QUERY_STRING", "")
form = cgi.parse_qs(query_string)
This should result in something like this:
{'id': ['123']}
First off, you should make dictionary lookups via
possibly_none = my_dict.get( "key_name" )
Because this assigns None to the variable, if the key is not in the dict. You can then use the
if key is not None:
do_stuff
idiom (yes, I'm a fan of null checks and defensive programming in general...). The python documentation suggests something along these lines as well.
Without digging into the code too much, I think you should reference
form.get( 'id' ).value
in order to extract the data you seem to be asking for.
Related
I am using an API I found online for one of my scripts, and I am wondering if I can change one word from the API to something else. My code is:
import requests
people = requests.get('https://insult.mattbas.org/api/insult')
print("Welcome to the insult machine!\nType somebody you want to insult!")
b = input()
print(people.replace("You", b))
Is replace not a command? If so, what plugin and/or commands would I need to do it? Thanks!
The value returned from requests.get isn’t a string, it’s a response object and that class has no replace method.
Have a look at the structure of that class. For example, you can do r = requests.get(...) and r.text.replace(...).
In other words, you need to operate on the text part of the response object.
I am looking to implement full text search in my python application using pymongo. I have been looking at this question but for some reason I am unable to implement this in my project as I am getting an error no such cmd: text. Can anyone direct me on what I am doing wrong?
Here is my code:
db = client.test
collection = db.videos
def search_for_videos(self, search_text)
self.db.command("text", "videos",
search=search_text,
limit=10)
The collection I am trying to search is called videos however I am not sure if I am putting this in the correct parameter, and I also am not sure if I need the line project={"name": 1, "_id": 0}.
The documentation here I believe is using the mongo shell to execute commands, however I wish to perform this action in my code.
I have looked at using the db.videos.find() function, but cannot seem to implement it correctly either.
How to I use PyMongo Full Text Search from my Python Code?
First be sure that you have a text index created on the field as mentioned here or you can just do it with pymongo too :
collection.create_index([('your field', 'text')])
Using pymongo you can do this to search:
collection.find({"$text": {"$search": your search}})
your function should look like this:
def search_for_videos(search_text):
collection.find({"$text": {"$search": search_text}}).limit(10)
I hope this helps you.
First create a text index based on the field you want to do the search on.
from pymongo import TEXT
db = MongoClient('localhost',port = 27017).DBNAME
db.collection.create_index([('FIELD_NAME',TEXT)],default_language ="english")
once you create the text index use the following query to search text. Depending on the size of your database, it might take long to create the text index.
db.collection.find({"$text": {"$search": your search}})
I'm trying to run some queries against Pubmed's Eutils service. If I run them on the website I get a certain number of records returned, in this case 13126 (link to pubmed).
A while ago I bodged together a python script to build a query to do much the same thing, and the resultant url returns the same number of hits (link to Eutils result).
Of course, not having any formal programming background, it was all a bit cludgy, so I'm trying to do the same thing using Biopython. I think the following code should do the same thing, but it returns a greater number of hits, 23303.
from Bio import Entrez
Entrez.email = "A.N.Other#example.com"
handle = Entrez.esearch(db="pubmed", term="stem+cell[All Fields]",datetype="pdat", mindate="2012", maxdate="2012")
record = Entrez.read(handle)
print(record["Count"])
I'm fairly sure it's just down to some subtlety in how the url is being generated, but I can't work out how to see what url is being generated by Biopython. Can anyone give me some pointers?
Thanks!
EDIT:
It's something to do with how the url is being generated, as I can get back the original number of hits by modifying the code to include double quotes around the search term, thus:
handle = Entrez.esearch(db='pubmed', term='"stem+cell"[ALL]', datetype='pdat', mindate='2012', maxdate='2012')
I'm still interested in knowing what url is being generated by Biopython as it'll help me work out how i have to structure the search term for when i want to do more complicated searches.
handle = Entrez.esearch(db="pubmed", term="stem+cell[All Fields]",datetype="pdat", mindate="2012", maxdate="2012")
print(handle.url)
You've solved this already (Entrez likes explicit double quoting round combined search terms), but currently the URL generated is not exposed via the API. The simplest trick would be to edit the Bio/Entrez/__init__.py file to add a print statement inside the _open function.
Update: Recent versions of Biopython now save the URL as an attribute of the returned handle, i.e. in this example try doing print(handle.url)
Complete newbie question.
I am developing a class for searching a movie database using an API.
Here is how you make a query using the movie title and year from within the Python interpreter:
import moviesearch
movie_db = moviesearch.MovieSearch()
result = movie_db.search('Clockwork Orange', year='1971')
print result
Doing this particular query yields one result from the service I am using.
To save typing for testing, I have created the following script m.py:
from sys import argv
import moviesearch
script, movie_name, params = argv
movie_db = moviesearch.MovieSearch()
result = movie_db.search(movie_name, params)
print result
When I execute this script like so:
python m.py 'Clockwork Orange', year='1971'
the service yields two results.
So this means that there is something wrong with the way I am formatting my parameters when I am testing the class with the script. Can someone please tell me what I am doing wrong?
I am not including the class for querying the movie database because I don't think that's necessary for figuring out what's wrong. What I need to know is how to properly format my parameters when using the script so that it executes exactly as it does in the example above where I am using the class directly from the Python interpreter.
Thanks in advance for any help.
When you do this in the shell (I'm assuming a *nix platform with an sh-compatible shell; Windows is probably slightly different):
python m.py 'Clockwork Orange', year='1971'
The sys.argv list will be:
['m.py', 'Clockwork Orange,', 'year=1971']
So, when you do this:
script, movie_name, params = argv
You end up with movie_name set to the string 'Clockwork Orange,' (with an extra comma), and params set to the string 'year=1971'. So, your call is ultimately:
result = movie_db.search('Clockwork Orange,', 'year=1971')
This is not the same as:
result = movie_db.search('Clockwork Orange', year='1971')
So, how do you get what you want?
Well, you can parse the params, with code something like this:
params = dict(pair.split('=') for pair in argv[2:])
result = movie_db.search(movie_name, **params)
The first line will give you a dict with {'year': '1971'}. Then you can use the ** syntax to forward that dict as the keyword arguments to the function.
Finally, you should take out the extra comma in the arguments you use to run the script. (You could write code to strip it, but it seems like it's just a typo, so the better fix is to not make that typo.)
I'm trying to send a Python list in to client side (encoded as JSON). This is the code snippet which I have written:
array_to_js = [vld_id, vld_error, False]
array_to_js[2] = True
jsonValidateReturn = simplejson.dumps(array_to_js)
return HttpResponse(jsonValidateReturn, mimetype='application/json')
How do I access it form client side? Can I access it like the following?
jsonValidateReturn[0]
Or how do I assign a name to the returned JSON array in order to access it?
Actually I'm trying to convert a server side Ajax script that returns an array (see Stack Overflow question Creating a JSON response using Django and Python that handles client side POST requests, so I wanted the same thing in return with Python, but it didn't go well.
The JSON array will be dumped without a name / assignment.
That is, in order to give it a name, in your JavaScript code you would do something like this:
var my_json_data_dump = function_that_gets_json_data();
If you want to visualize it, for example, substitute:
var my_json_data_dump = { 'first_name' : Bob, 'last_name': smith };
Also, like Iganacio said, you're going to need something like json2.js to parse the string into the object in the last example. You could wrap that parsing step inside of function_that_gets_json_data, or if you're using jQuery you can do it with a function like jQuery.getJSON().
json2.js is still nice to have, though.
In response to the comment (I need space and markup):
Yes, of course. All the Python side is doing is encoding a string representation (JSON) for you. You could do something like 'var blah = %s' % json.dumps(obj_to_encode) and then on the client side, instead of simply parsing the response as JSON, you parse it as JavaScript.
I wouldn't recommend this for a few reasons:
You're no longer outputting JSON. What if you want to use it in a context where you don't want the variable name, or can't parse JavaScript?
You're evaluating JavaScript instead of simply parsing JSON. It's an operation that's open to security holes (if someone can seed the data, they might be able to execute a XSS attack).
I guess you're facing something I think every Ajax developer runs in to. You want one place of truth in your application, but now you're being encouraged to define variables and whatnot in JavaScript. So you have to cross reference your Python code with the JavaScript code that uses it.
I wouldn't get too hung up on it. I can't see why you would absolutely need to control the name of the variable from Python in this manner. If you're counting on the variable name being the same so that you can reference it in subsequent JavaScript or Python code, it's something you might obviate by simply restructuring your code. I don't mean that as a criticism, just a really helpful (in general) suggestion!
If both client and server are in Python, here's what you need to know.
Server. Use a dictionary to get labels on the fields. Write this as the response.
>>> import json
>>> json.dumps( {'vld_id':1,'vls_error':2,'something_else':True} )
'{"vld_id": 1, "something_else": true, "vls_error": 2}'
Client. After reading the response string, create a Python dictionary this way.
>>> json.loads( '{"vld_id": 1, "something_else": true, "vls_error": 2}' )
{u'vld_id': 1, u'something_else': True, u'vls_error': 2}