import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
That is my JSON array, but I would want to convert all the values in the fruits string to a Python list. What would be the correct way of doing this?
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
print data['fruits']
# the print displays:
# [u'apple', u'banana', u'orange']
You had everything you needed. data will be a dict, and data['fruits'] will be a list
Tested on Ideone.
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
fruits_list = data['fruits']
print fruits_list
data will return you a string representation of a list, but it is actually still a string. Just check the type of data with type(data). That means if you try using indexing on this string representation of a list as such data['fruits'][0], it will return you "[" as it is the first character of data['fruits']
You can do json.loads(data['fruits']) to convert it back to a Python list so that you can interact with regular list indexing. There are 2 other ways you can convert it back to a Python list suggested here
Related
I hope to use the dictionary load by json file. However, each item contains the character 'u'. I need to remove the 'u's.
I tried dumps, but it does not work.
import ast
import json
data= {u'dot',
u'dog',
u'fog',
u'eeee'}
res = eval(json.dumps(data))
print res
I hope to get: {
'dot',
'dog',
'fog,
'eeee'
}
But the error is:
TypeError: set([u'eeee', u'fog', u'dog', u'dot']) is not JSON serializable
The strings that start with u are unicode strings.
In your case, this has nothing to do with the problem:
data= {u'dot',
u'dog',
u'fog',
u'eeee'}
This creates a set and stores the results in the data variable. The json serializer can't handle sets since the json spec makes no mention of them. If you change this to be a list, the serializer can handle the data:
res = set(eval(json.dumps(list(data))))
Here I'm converting the data variable to a list to serialize it, then converting it back to a set to store the result in the res variable.
Alternatively, you can directly ask Python to convert the unicode strings to strings, using something like this:
res = {x.encode("utf-8") for x in data}
print(res)
I have data that look like this:
data = 'somekey:value4thekey&second-key:valu3-can.be?anything&third_k3y:it%can have spaces;too'
In a nice human-readable way it would look like this:
somekey : value4thekey
second-key : valu3-can.be?anything
third_k3y : it%can have spaces;too
How should I parse the data so when I do data['somekey'] I would get >>> value4thekey?
Note: The & is connecting all of the different items
How am I currently tackling with it
Currently, I use this ugly solution:
all = data.split('&')
for i in all:
if i.startswith('somekey'):
print i
This solution is very bad due to multiple obvious limitations. It would be much better if I can somehow parse it into a python tree object.
I'd split the string by & to get a list of key-value strings, and then split each such string by : to get key-value pairs. Using dict and list comprehensions actually makes this quite elegant:
result = {k:v for k, v in (part.split(':') for part in data.split('&'))}
You can parse your data directly to a dictionary - split on the item separator & then split again on the key,value separator ::
table = {
key: value for key, value in
(item.split(':') for item in data.split('&'))
}
This allows you direct access to elements, e.g. as table['somekey'].
If you don't have objects within a value, you can parse it to a dictionary
structure = {}
for ele in data.split('&'):
ele_split = ele.split(':')
structure[ele_split[0]] = ele_split[1]
You can now use structure to get the values:
print structure["somekey"]
#returns "value4thekey"
Since the keys have a common format of being in the form of "key":"value".
You can use it as a parameter to split on.
for i in x.split("&"):
print(i.split(":"))
This would generate an array of even items where every even index is the key and odd index being the value. Iterate through the array and load it into a dictionary. You should be good!
I'd format data to YAML and parse the YAML
import re
import yaml
data = 'somekey:value4thekey&second-key:valu3-can.be?anything&third_k3y:it%can have spaces;too'
yaml_data = re.sub('[:]', ': ', re.sub('[&]', '\n', data ))
y = yaml.load(yaml_data)
for k in y:
print "%s : %s" % (k,y[k])
Here's the output:
third_k3y : it%can have spaces;too
somekey : value4thekey
second-key : valu3-can.be?anything
I am trying to create a list from a url that I have converted to json. I am trying to filter the json list and load the objects into a list then iterate through the list.
requestT = requests.get('https://api.binance.com/api/v1/ticker/allPrices')
json_dataT = json.loads(requestT.text)
ticker_list = json_dataT['symbol']
return;
`
I get an error stating, TypeError: list indices must be integers or slices, not str
I cant seem to find an example of text to json to list.
You need to iterate over the complete list to get the values, here is the corrected version of code in which ticker_list will give you list of all the symbols present in the result from the api.
import requests
import json
requestT = requests.get('https://api.binance.com/api/v1/ticker/allPrices')
json_dataT = json.loads(requestT.text)
ticker_list=[]
for data in json_dataT:
ticker_list.append( data['symbol'])
print ticker_list
json_dataT is a list of dicts. To access the value of 'symbol' in each dict, you could try this:
import requests
import json
requestT = requests.get('https://api.binance.com/api/v1/ticker/allPrices')
json_dataT = json.loads(requestT.text)
ticker_list = [d['symbol'] for d in json_dataT]
>>> ticker_list
['ETHBTC', 'LTCBTC', 'BNBBTC', 'NEOBTC', '123456', 'QTUMETH', 'EOSETH', 'SNTETH', ...]
In my data frame,one of column has string values as array look.I get them and stored in an array.Then array look like,
S=['[18831]', '[12329]', '[4526, 5101, 11276]', '[14388, 14389]']
I want it to be
S= [18831,12329,[4526, 5101, 11276],[14388, 14389]]
as 2d array to access this IDs.How to do this using python
Those lists are in JSON format so you could use the built in JSON parser.
import json
stringArray = "[1,2,3]"
integerArray = json.loads(stringArray) # [1,2,3]
Check out https://docs.python.org/2/library/json.html
Try this:
[eval(a)[0] if len(eval(a)) == 1 else eval(a) for a in S]
I am getting some values from a html form and I am storing these values to a list. List is like:
["string1", "string2", "string3", "string4", "string5"]
I want to store these values in rows of mysql but I am confused how to do?
What I did till now is:
descrip = []
descrip.append(description1)
descrip.append(description2)
descrip.append(description3)
descrip.append(description4)
descrip.append(description5)
for r in descrp:
result_descrp = db.execute("""INSERT INTO description(id,description) VALUES (1,%s)""",((descrip))
return render_template('forms/success.html')
But I am getting this error:
TypeError: not all arguments converted during string formatting
At first, You use the placeholder %s in the format string which expect a str. But you pass a list to it.
And I don't know the type of description in your schema. If you just want to save the string presentation of list in the database, you can transform list to str with str(desciption).
And Mysql also support json type of field.(MariaDB also support json type.)
descrip = []
descrip.append(description1)
descrip.append(description2)
descrip.append(description3)
descrip.append(description4)
descrip.append(description5)
for r in range(5):
if descrip[r]:
result_add_event = db.execute("""INSERT INTO event_description(event_id,title,description, created_at) VALUES (%s,%s,%s)""",(id,descrip[r],timestamp))
This above code worked very fine. :)
Special thanks to #shiva and also to those who helped me.