I'm trying to learn Python and have following problem:
I get an error while running this as it cannot see the 'name' attribute in data.
It works when I grab one by one items from JSON. However when I want to do it in a loop it fails.
I assume my error is wrong request. That it cannot read JSON correctly and see attributes.
import requests
import json
def main():
req = requests.get('http://pokeapi.co/api/v2/pokemon/')
print("HTTP Status Code: " + str(req.status_code))
print(req.headers)
json_obj = json.loads(req.content)
for i in json_obj['name']:
print(i)
if __name__ == '__main__':
main()
You want to access the name attribute of the results attribute in your json_object like this:
for pokemon in json_obj['results']:
print (pokemon['name'])
I was able to guess that you want to access the results keys because I have looked at the result of
json_obj.keys()
that is
dict_keys(['count', 'previous', 'results', 'next'])
Because all pokemons are saved in a list which is under keyword results, so you firstly need to get that list and then iterate over it.
for result in json_obj['results']:
print(result['name'])
A couple things: as soon mentioned, iterating through json_obj['name'] doesn't really make sense - use json_obj['results'] instead.
Also, you can use req.json() which is a method that comes with the requests library by default. That will turn the response into a dictionary which you can then iterate through as usual (.iteritems() or .items(), depending if you're using Python 2 or 3).
Related
I'm attempting to scrape PGA stats from the API below.
url = 'https://statdata.pgatour.com/r/stats/current/02671.json?userTrackingId=exp=1594257225~acl=*~hmac=464d3dfcda2b2ccb384b77ac7241436f25b7284fb2eb0383184f48cbdff33cc4'
response = requests.get(url)
pga_stats = response.json()
I would like to only select the nested keys identified in this image. I've been able to traverse to the 'year' key with the below code, but I receive the following AttributeError for anything beyond that.
test = pga_stats.get('tours')[0].get('years')
(prints reduced dictionary)
test = pga_stats.get('tours')[0].get('years').get('stats')
'list' object has no attribute 'get'
My end goal is to write this player data to a csv file. Any suggestions would be greatly appreciated.
pga_stats.get('tours')[0].get('years') returns a list, not a dict. You actually want to use the get method on it's first element, like this:
test = pga_stats.get('tours')[0].get('years')[0].get('stats')
I am working with an API and am having some issues getting it to output correctly. I am looking to extract each id and pass it to another api call. Currently api_response shows that it is a list. What is my best method for doing this. I have thought about using RE for this?
api_response = api_instance.graph_user_group_members_list(group_id, content_type, accept,limit=limit, skip=skip, x_org_id=x_org_id)
Try a list comprehension
[each_item['to']['id'] for each_item in api_response if 'id' in each_item['to']]]
I'm a Python novice, thanks for your patience.
I retrieved a web page, using the requests module. I used Beautiful Soup to harvest a few hundred href objects (links). I used uritools to create an array of full URLs for the target pages I want to download.
I don't want everybody who reads this note to bombard the web server with requests, so I'll show a hypothetical example that is realistic for just 2 hrefs. The array looks like this:
hrefs2 = ['http://ku.edu/pls/WP040?PT001F01=910&pf7331=11',
'http://ku.edu/pls/WP040?PT001F01=910&pf7331=12']
If I were typing these into 100s of lines of code, I understand what to do in order to retrieve each page:
from lxml import html
import requests
url = 'http://ku.edu/pls/WP040/'
payload = {'PT001F01' : '910', 'pf7331' : '11')
r = requests.get(url, params = payload)
Then get the second page
payload = {'PT001F01' : '910', 'pf7331' : '12')
r = requests.get(url, params = payload)
And keep typing in payload objects. Not all of the hrefs I'm dealing with are sequential, not all of the payloads are different simply in the last integer.
I want to automate this and I don't see how to create the payloads from the hrefs2 array.
While fiddling with uritools, I find urisplit which can give me the part I need to parse into a payload:
[urisplit(x)[3] for x in hrefs2]
['PT001F01=910&pf7331=11',
'PT001F01=910&pf7331=12']
Each one of those has to be turned into a payload object and I don't understand what to do.
I'm using Python3 and I used uritools because that appears to be the standards-compliant replacement of urltools.
I fell back on shell script to get pages with wget, which does work, but it is so un-Python-ish that I'm asking here for what to do. I mean, this does work:
import subprocess
for i in hrefs2:
subprocess.call(["wget", i])
You can pass the full url to requests.get() without splitting up the parameters.
>>> requests.get('http://ku.edu/pls/WP040?PT001F01=910&pf7331=12')
<Response [200]>
If for some reason you don't want to do that, you'll need to split up the parameters some how. I'm sure there are better ways to do it, but the first thing that comes to mind is:
a = ['PT001F01=910&pf7331=11',
'PT001F01=910&pf7331=12']
# list to store all url parameters after they're converted to dicts
urldata = []
#iterate over list of params
for param in a:
data = {}
# split the string into key value pairs
for kv in param.split('&'):
# split the pairs up
b = kv.split('=')
# first part is the key, second is the value
data[b[0]] = b[1]
# After converting every kv pair in the parameter, add the result to a list.
urldata.append(data)
You could do this with less code but I wanted to be clear what was going on. I'm sure there is already a module somewhere out there that does this for you too.
I have a list of URLs that all use the same json structure. I am trying to pull specific dictionary objects from all of the URLs at once with grequest. I am able to do it with one URL, though I am using request:
import requests
import json
main_api = 'https://bittrex.com/api/v1.1/public/getorderbook?market=BTC-1ST&type=both&depth=50'
json_data = requests.get(main_api).json()
Quantity = json_data['result']['buy'][0]['Quantity']
Rate = json_data['result']['buy'][0]['Rate']
Quantity_2 = json_data['result']['sell'][0]['Quantity']
Rate_2 = json_data['result']['sell'][0]['Rate']
print ("Buy")
print(Rate)
print(Quantity)
print ("")
print ("Sell")
print(Rate_2)
print(Quantity_2)
I want to be able to print what I printed above, for every URL. But I do not know where to begin. This is what I have so far:
import grequests
import json
urls = [
'https://bittrex.com/api/v1.1/public/getorderbook?market=BTC-1ST&type=both&depth=50',
'https://bittrex.com/api/v1.1/public/getorderbook?market=BTC-2GIVE&type=both&depth=50',
'https://bittrex.com/api/v1.1/public/getorderbook?market=BTC-ABY&type=both&depth=50',
]
requests = (grequests.get(u) for u in urls)
responses = grequests.map(requests)
I thought it would be something like print(response.json(['result']['buy'][0]['Quantity'] for response in responses)) but that does not work at all, and python returns the following: print(responses.json(['result']['buy'][0]['Quantity'] for response in responses)) AttributeError: 'list' object has no attribute 'json'. I am very new to python, and coding in general, and I would appreciate any help.
Your responses variable is a list of Response objects. If you simple print the list with
print(responses)
it gives you
[<Response [200]>, <Response [200]>, <Response [200]>]
the brackets [] tell you that this is a list and it contains three Responseobjects.
When you type responses.json(...) you are telling python to call the json() method on the list object. The list, however does not offer such a method, only the objects in the list have it.
What you need to do is access an element in the list and call the json() method on this element. This done by specifying the position of the list element you want to access like this:
print(responses[0].json()['result']['buy'][0]['Quantity'])
This will access the first element in the responses list.
Of course, it is not practical to access each list element individually if you want to output many items. That's why there are loops. Using a loop you can simply say: do this for each element in my list. This looks like this:
for response in responses:
print("Buy")
print(response.json()['result']['buy'][0]['Quantity'])
print(response.json()['result']['buy'][0]['Rate'])
print("Sell")
print(response.json()['result']['sell'][0]['Quantity'])
print(response.json()['result']['sell'][0]['Rate'])
print("----")
The for-each-loop executes the indented lines of code for each element in the list. The current element is available in the response variable.
So I'm trying to learn Python here, and would appreciate any help you guys could give me. I've written a bit of code that asks one of my favorite websites for some information, and the api call returns an answer in a dictionary. In this dictionary is a list. In that list is a dictionary. This seems crazy to me, but hell, I'm a newbie.
I'm trying to assign the answers to variables, but always get various error messages depending on how I write my {},[], or (). Regardless, I can't get it to work. How do I read this return? Thanks in advance.
{
"answer":
[{"widgets":16,
"widgets_available":16,
"widgets_missing":7,
"widget_flatprice":"156",
"widget_averages":15,
"widget_cost":125,
"widget_profit":"31",
"widget":"90.59"}],
"result":true
}
Edited because I put in the wrong sample code.
You need to show your code, but the de-facto way of doing this is by using the requests module, like this:
import requests
url = 'http://www.example.com/api/v1/something'
r = requests.get(url)
data = r.json() # converts the returned json into a Python dictionary
for item in data['answer']:
print(item['widgets'])
Assuming that you are not using the requests library (see Burhan's answer), you would use the json module like so:
data = '{"answer":
[{"widgets":16,
"widgets_available":16,
"widgets_missing":7,
"widget_flatprice":"156",
"widget_averages":15,
"widget_cost":125,
"widget_profit":"31",
"widget":"90.59"}],
"result":true}'
import json
data = json.loads(data)
# Now you can use it as you wish
data['answer'] # and so on...
First I will mention that to access a dictionary value you need to use ["key"] and not {}. see here an Python dictionary syntax.
Here is a step by step walkthrough on how to build and access a similar data structure:
First create the main dictionary:
t1 = {"a":0, "b":1}
you can access each element by:
t1["a"] # it'll return a 0
Now lets add the internal list:
t1["a"] = ["x",7,3.14]
and access it using:
t1["a"][2] # it'll return 3.14
Now creating the internal dictionary:
t1["a"][2] = {'w1':7,'w2':8,'w3':9}
And access:
t1["a"][2]['w3'] # it'll return 9
Hope it helped you.