I am new to Python and am trying to connect to Poloniex API.
They provide this wrapper which is great.
import urllib
import urllib2
import json
import time
import hmac,hashlib
def createTimeStamp(datestr, format="%Y-%m-%d %H:%M:%S"):
return time.mktime(time.strptime(datestr, format))
class poloniex:
def __init__(self, APIKey, Secret):
self.APIKey = APIKey
self.Secret = Secret
def post_process(self, before):
after = before
# Add timestamps if there isnt one but is a datetime
if('return' in after):
if(isinstance(after['return'], list)):
for x in xrange(0, len(after['return'])):
if(isinstance(after['return'][x], dict)):
if('datetime' in after['return'][x] and 'timestamp' not in after['return'][x]):
after['return'][x]['timestamp'] = float(createTimeStamp(after['return'][x]['datetime']))
return after
def api_query(self, command, req={}):
if(command == "returnTicker" or command == "return24Volume"):
ret = urllib2.urlopen(urllib2.Request('https://poloniex.com/public?command=' + command))
return json.loads(ret.read())
elif(command == "returnOrderBook"):
ret = urllib2.urlopen(urllib2.Request('https://poloniex.com/public?command=' + command + '¤cyPair=' + str(req['currencyPair'])))
return json.loads(ret.read())
elif(command == "returnMarketTradeHistory"):
ret = urllib2.urlopen(urllib2.Request('https://poloniex.com/public?command=' + "returnTradeHistory" + '¤cyPair=' + str(req['currencyPair'])))
return json.loads(ret.read())
else:
req['command'] = command
req['nonce'] = int(time.time()*1000)
post_data = urllib.urlencode(req)
sign = hmac.new(self.Secret, post_data, hashlib.sha512).hexdigest()
headers = {
'Sign': sign,
'Key': self.APIKey
}
ret = urllib2.urlopen(urllib2.Request('https://poloniex.com/tradingApi', post_data, headers))
jsonRet = json.loads(ret.read())
return self.post_process(jsonRet)
def returnTicker(self):
return self.api_query("returnTicker")
def return24Volume(self):
return self.api_query("return24Volume")
def returnOrderBook (self, currencyPair):
return self.api_query("returnOrderBook", {'currencyPair': currencyPair})
def returnMarketTradeHistory (self, currencyPair):
return self.api_query("returnMarketTradeHistory", {'currencyPair': currencyPair})
# Returns all of your balances.
# Outputs:
# {"BTC":"0.59098578","LTC":"3.31117268", ... }
def returnBalances(self):
return self.api_query('returnBalances')
# Returns your open orders for a given market, specified by the "currencyPair" POST parameter, e.g. "BTC_XCP"
# Inputs:
# currencyPair The currency pair e.g. "BTC_XCP"
# Outputs:
# orderNumber The order number
# type sell or buy
# rate Price the order is selling or buying at
# Amount Quantity of order
# total Total value of order (price * quantity)
def returnOpenOrders(self,currencyPair):
return self.api_query('returnOpenOrders',{"currencyPair":currencyPair})
# Returns your trade history for a given market, specified by the "currencyPair" POST parameter
# Inputs:
# currencyPair The currency pair e.g. "BTC_XCP"
# Outputs:
# date Date in the form: "2014-02-19 03:44:59"
# rate Price the order is selling or buying at
# amount Quantity of order
# total Total value of order (price * quantity)
# type sell or buy
def returnTradeHistory(self,currencyPair):
return self.api_query('returnTradeHistory',{"currencyPair":currencyPair})
# Places a buy order in a given market. Required POST parameters are "currencyPair", "rate", and "amount". If successful, the method will return the order number.
# Inputs:
# currencyPair The curreny pair
# rate price the order is buying at
# amount Amount of coins to buy
# Outputs:
# orderNumber The order number
def buy(self,currencyPair,rate,amount):
return self.api_query('buy',{"currencyPair":currencyPair,"rate":rate,"amount":amount})
# Places a sell order in a given market. Required POST parameters are "currencyPair", "rate", and "amount". If successful, the method will return the order number.
# Inputs:
# currencyPair The curreny pair
# rate price the order is selling at
# amount Amount of coins to sell
# Outputs:
# orderNumber The order number
def sell(self,currencyPair,rate,amount):
return self.api_query('sell',{"currencyPair":currencyPair,"rate":rate,"amount":amount})
# Cancels an order you have placed in a given market. Required POST parameters are "currencyPair" and "orderNumber".
# Inputs:
# currencyPair The curreny pair
# orderNumber The order number to cancel
# Outputs:
# succes 1 or 0
def cancel(self,currencyPair,orderNumber):
return self.api_query('cancelOrder',{"currencyPair":currencyPair,"orderNumber":orderNumber})
On a separate file I have this:
import poloniex
myapi = poloniex("My APIKey is here","My Secret is here")
balance = myapi.returnBalances()
print balance
It returns "TypeError: 'module' object is not callable" as well as "E1102:poloniex is not callable."
What am I doing wrong? Again I am new to python and coding so I may be doing something stupid :)
It's a sign that import poloniex doesn't actually place a class with that name in your current namespace. Consult their documentation for how exactly to import, but frequently in this scenario the solution will be something like from poloniex import poloniex.
Orthogonally, you can leave the import as is, and instead change your code to use poloniex.poloniex() instead of poloniex().
In case that's not clear, we are saying "from filename import classname" as opposed to "import filename"; and the error message is basically saying "filename is a filename, not a class name."
A well-defined module has an __init.py__ which takes care of these things for you. Sometimes the author wrote documentation but then forgot to actually set these things up in __init__.py the way they had planned. If they only run tests within their source tree, they are not testing this aspect of the functionality.