Issue with newest example - trying to use a different function, but need help with proper inputs

`import robin_stocks as r import os import datetime import time as t

‘’’ This is an example script that will print out options data every 10 seconds for 1 minute. It also saves the data to a txt file. The txt file is saved in the same directory as this code. ‘’’

#!!! Fill out username and password username = ‘’ password = ‘’ #!!!

login = r.login(username,password)

#!!! fill out the specific option information strike = 150.0 date = “2019-06-21” stock = “V” optionType = “call” #or “put” #!!!

File saving variables

minutesToTrack = 1 #in minutes PrintInterval = 10 #in seconds endTime = t.time() + 60 * minutesToTrack fileName = “options.txt” writeType = “w” #or enter “a” to have it continuously append every time script is run

os.chdir(os.path.dirname(file)) path = os.getcwd() filename = os.path.join(path,fileName) fileStream = open(filename,mode=writeType)

while t.time() < endTime: time = str(datetime.datetime.now()) #Both write and print the data so that you can view it as it runs. fileStream.write(“\n”) fileStream.write(time) print(time) #Get the data instrument_Data = r.get_option_instrument_data(stock,date,strike,optionType) market_Data = r.get_option_market_data(stock,date,strike,optionType)

fileStream.write("\n")
fileStream.write("{} Instrument Data {}".format("="*30,"="*30))
print("{} Instrument Data {}".format("="*30,"="*30))
#Instrument_Data is a dictionary, and the key/value pairs can be accessed with .items()
for key, value in instrument_Data.items():
    fileStream.write("\n")
    fileStream.write("key: {:<25} value: {}".format(key,value))
    print("key: {:<25} value: {}".format(key,value))

fileStream.write("\n")
fileStream.write("{} Market Data {}".format("="*30,"="*30))
print("{} Market Data {}".format("="*30,"="*30))

for key, value in market_Data.items():
    fileStream.write("\n")
    fileStream.write("key: {:<25} value: {}".format(key,value))
    print("key: {:<25} value: {}".format(key,value))

t.sleep(PrintInterval)

#make sure to close the file stream when you are done with it. fileStream.close()`

---

I am getting an error while trying to use a different function for options data.

I get this error:

Traceback (most recent call last): File “C:\Users\Username\Desktop\Python\Version 2.1.py”, line 63, in <module> for key, value in OptData.item(): AttributeError: ‘list’ object has no attribute ‘item’

I am using the function, '#Get the data OptData = r.find_options_for_stock_by_expiration(symbol, expirationDate, optionType, info)

fileStream.write('\n')

fileStream.write("{} OptData".format("="*30,"="*30))
print("{} OptData {}".format("="*30,"="*30))
#OptData is a dictionary, and the key/value pairs can be accessed with .items()
## for key, value in OptData.items():
for key, value in OptData.items():
    item(['chain_symbol'])'

when I try to print it though, I’m missing something in the code and it is giving me this error. Some direction would be greatly appreciated. I tried to just replace what you had input with what I’m trying to get, the line I get the error on is: item([‘chain_symbol’])’

[jmfernandes]

hmmm, unfortunately I wasn’t able to replicate your error. This is the call I made

options_data = r.find_options_for_stock_by_expiration('spy', '2019-02-01', 'put')

and it worked for me with no errors. I ran it with ‘both’ at the end too, and it worked.I suggest double checking all your variables.

[jmfernandes]

read through this page to get more info on the difference between lists and dicts and how to access elements. section 5.6 goes over the looping techniques I use.

https://docs.python.org/3/tutorial/datastructures.html

There is also this page on how .items() works

http://www.tutorialspoint.com/python/dictionary_items.htm

but basically, if you want one specific dictionary value for a given key, you do dictionaryName[‘keyName’] and it returns what the value is. If you have a list of dictionaries then you probably want to loop over every element in the list in order to access the value In each dictionary. Alternatively, instead of getting a single value for a specific key name, you can loop over every key/value pair in a dictionary using .items(). It just depends if you want all values or just one, and whether you have direct reference to a dictionary or if that dictionary is stored in a list. Its also possible to have a list of lists or a dictionary that contains dictionaries, but there isn’t a lot of that going on in the code.