CCXT binance fetch_ohlcv function - binance

Question

I wanted to get crypto market data from binance api with CCXT using the fetch_ohlcv(), but received error when running the code below.
I have tried running without the since keyword and it worked fine. May I ask what is wrong with my startTime parameter? Or is there an issue with CCXT? Thanks!
Below is the error message:
---------------------------------------------------------------------------
HTTPError Traceback (most recent call last)
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/base/exchange.py in fetch(self, url, method, headers, body)
592 self.logger.debug("%s %s, Response: %s %s %s", method, url, http_status_code, headers, http_response)
--> 593 response.raise_for_status()
594
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/requests/models.py in raise_for_status(self)
942 if http_error_msg:
--> 943 raise HTTPError(http_error_msg, response=self)
944
HTTPError: 400 Client Error: Bad Request for url: https://api.binance.com/api/v3/klines?symbol=ETHBTC&interval=1d&limit=50&startTime=1589817600.0&endTime=5909817599.0
During handling of the above exception, another exception occurred:
BadRequest Traceback (most recent call last)
<ipython-input-113-43d055cced8d> in <module>
----> 1 exchange.fetch_ohlcv(symbol, timeframe, since=startDate, limit=limit)
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/binance.py in fetch_ohlcv(self, symbol, timeframe, since, limit, params)
1516 else:
1517 method = 'publicGetTickerBookTicker'
-> 1518 response = getattr(self, method)(query)
1519 return self.parse_tickers(response, symbols)
1520
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/base/exchange.py in inner(_self, params)
459 if params is not None:
460 inner_kwargs['params'] = params
--> 461 return entry(_self, **inner_kwargs)
462 return inner
463 to_bind = partialer()
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/binance.py in request(self, path, api, method, params, headers, body)
3572 elif (type == 'delivery') or (type == 'inverse'):
3573 method = 'dapiPrivateGetPositionRisk'
-> 3574 else:
3575 raise NotSupported(self.id + ' fetchIsolatedPositions() supports linear and inverse contracts only')
3576 response = getattr(self, method)(self.extend(request, params))
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/base/exchange.py in fetch2(self, path, api, method, params, headers, body)
480 self.lastRestRequestTimestamp = self.milliseconds()
481 request = self.sign(path, api, method, params, headers, body)
--> 482 return self.fetch(request['url'], request['method'], request['headers'], request['body'])
483
484 def request(self, path, api='public', method='GET', params={}, headers=None, body=None):
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/base/exchange.py in fetch(self, url, method, headers, body)
607 except HTTPError as e:
608 details = ' '.join([self.id, method, url])
--> 609 self.handle_errors(http_status_code, http_status_text, url, method, headers, http_response, json_response, request_headers, request_body)
610 self.handle_http_status_code(http_status_code, http_status_text, url, method, http_response)
611 raise ExchangeError(details) from e
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/binance.py in handle_errors(self, code, reason, url, method, headers, body, response, requestHeaders, requestBody)
3566 raise NotSupported(self.id + ' fetchIsolatedPositions() supports linear and inverse contracts only')
3567 defaultType = self.safe_string_2(self.options, 'fetchIsolatedPositions', 'defaultType', defaultType)
-> 3568 type = self.safe_string(params, 'type', defaultType)
3569 params = self.omit(params, 'type')
3570 if (type == 'future') or (type == 'linear'):
~/Desktop/crypto/trading/env/lib/python3.8/site-packages/ccxt/base/exchange.py in throw_exactly_matched_exception(self, exact, string, message)
498 def throw_exactly_matched_exception(self, exact, string, message):
499 if string in exact:
--> 500 raise exact[string](message)
501
502 def throw_broadly_matched_exception(self, broad, string, message):
BadRequest: binance {"code":-1100,"msg":"Illegal characters found in parameter 'startTime'; legal range is '^[0-9]{1,20}$'."}
Code:
symbol = 'ETH/BTC'
timeframe = '1d'
limit = 50 #Default best for binance
startDate = "2020-05-19"
startDate = datetime.strptime(startDate, "%Y-%m-%d")
startDate = datetime.timestamp(startDate)
config = {
'rateLimit': 10000,
'apiKey': apiKey,
'secret': secretKey
}
exchange = ccxt.binance(config)
exchange.fetch_ohlcv(symbol, timeframe, since=startDate, limit=limit)

Answer 1

your mistake is startDate format:
startDate = datetime.timestamp(startDate)
print(startDate) #output: 1589846400.0
first you must convert it to integer and then multiply by 1000 to convert to millisecond:
from datetime import datetime
startDate = "2020-05-19"
startDate = datetime.strptime(startDate, "%Y-%m-%d")
startDate = datetime.timestamp(startDate)
startDate = int(startDate) * 1000
print(startDate) #output: 1589846400000