What is wrong with my while loop (Python)? - while-loop

Question

I am quite new to programming and I face a strange issue with the below while-loop in Python. When I manually run the code below the loop (i.e. starting with "time now..." to "t += 1"), I get the output I want:
The time is now: 13:31:01
Your current position is -1
This is iteration: 1
The time is now: 13:32:01
Your current position is -1
This is iteration: 2
However, when I run the full loop, I get double, triple or multiple prints of the same minute (see output below the while-loop code).
Do you see the issue with this loop? Its as if the "t += 1" increment is running several times per loop (i.e. for each minute several prints). I dont get it.
Thanks for your help!
Blockquote
t=1
while t < 2000:
time_now = (time.strftime('%H:%M:%S', time.localtime(int(time.time()))))
if time_now[6:8] == str('00'):
sleep(1)
elif time_now[6:8] == str('01'):
sleep(0)
else:
x = 61 - int(time_now[6:8])
sleep(x)
time_now = (time.strftime('%H:%M:%S', time.localtime(int(time.time()))))
print("The time is now: " + time_now)
#+1 is the middle bar
totalBars = leftBars + rightBars + 1
swing_candles = client.Trade.Trade_getBucketed(symbol=symbol, binSize="1m", count=totalBars, reverse=True).result()[0]
last_highs = []
last_lows = []
i=0
while i <= (len(swing_candles)-1):
last_highs.append(swing_candles[i]["high"])
last_lows.append(swing_candles[i]["low"])
i += 1
#get the highest high and the lowest low
highest_high = max(last_highs)
lowest_low = min(last_lows)
#check if there are existing positions & orders
positions_quantity = client.Position.Position_get().result()[0][0]["currentQty"]
#check existing orders
buy_orders_quantity = []
sell_orders_quantity = []
orders_quantity = client.Order.Order_getOrders(filter=json.dumps({"open": True})).result()[0]
h=0
while h <= len(orders_quantity)-1:
if orders_quantity[h]["side"] == "Sell":
sell_orders_quantity.append(orders_quantity[h])
elif orders_quantity[h]["side"] == "Buy":
buy_orders_quantity.append(orders_quantity[h])
h += 1
if highest_high == last_highs[rightBars] and positions_quantity == 0:
if buy_orders_quantity == []:
client.Order.Order_new(symbol = symbol, orderQty = orderQty*1, side = "Buy", ordType = 'Stop', stopPx = highest_high, execInst ='LastPrice' ).result()
elif buy_orders_quantity != []:
orderID = buy_orders_quantity[0]["orderID"]
client.Order.Order_amend(orderID=orderID, orderQty=orderQty*1, stopPx = highest_high).result()
else:
pass
elif highest_high == last_highs[rightBars] and positions_quantity > 0:
#dont place any additional long
pass
elif highest_high == last_highs[rightBars] and positions_quantity < 0:
if buy_orders_quantity != []:
orderID = buy_orders_quantity[0]["orderID"]
client.Order.Order_amend(orderID=orderID, orderQty=orderQty*2, stopPx = highest_high).result()
else:
client.Order.Order_new(symbol = symbol, orderQty = (orderQty)*2, side = "Buy", ordType = 'Stop', stopPx = highest_high, execInst ='LastPrice' ).result()
elif lowest_low == last_lows[rightBars] and positions_quantity == 0:
if sell_orders_quantity == []:
client.Order.Order_new(symbol = symbol, orderQty = (orderQty)*-1, side = "Sell", ordType = 'Stop', stopPx = lowest_low, execInst ='LastPrice' ).result()
elif sell_orders_quantity != []:
orderID = sell_orders_quantity[0]["orderID"]
client.Order.Order_amend(orderID=orderID, orderQty=orderQty*-1, stopPx = lowest_low ).result()
else:
pass
elif lowest_low == last_lows[rightBars] and positions_quantity < 0:
#dont place any additional shorts
pass
elif lowest_low == last_lows[rightBars] and positions_quantity > 0:
if sell_orders_quantity != []:
orderID = sell_orders_quantity[0]["orderID"]
client.Order.Order_amend(orderID=orderID, orderQty=orderQty*-2, stopPx = lowest_low).result()
else:
#if there is no order, place new order with double amount
client.Order.Order_new(symbol = symbol, orderQty = (orderQty)*-2, side = "Sell", ordType = 'Stop', stopPx = lowest_low, execInst ='LastPrice' ).result()
positions_quantity = client.Position.Position_get().result()[0][0]["currentQty"]
print("Your current position is " + str(positions_quantity))
print("This is iteration: " + str(t))
t += 1
This is the output when I run the while-loop above (however each minute there should be just one print, but starting with iteration two there are several prints for the same minute (loop)):
The time is now: 13:39:01
Your current position is -1
This is iteration: 1
The time is now: 13:39:01
Your current position is -1
This is iteration: 2
The time is now: 13:40:01
Your current position is -1
This is iteration: 3
The time is now: 13:40:01
Your current position is -1
This is iteration: 4
The time is now: 13:40:01
Your current position is -1
This is iteration: 5
The time is now: 13:40:01
Your current position is -1
This is iteration: 6
The time is now: 13:40:01
Your current position is -1
This is iteration: 7
The time is now: 13:41:01
Your current position is -1
This is iteration: 8
The time is now: 13:41:01
Your current position is -1
This is iteration: 9
The time is now: 13:41:01
Your current position is -1
This is iteration: 10
The time is now: 13:41:01
Your current position is -1
This is iteration: 11
The time is now: 13:41:01
Your current position is -1
This is iteration: 12

Answer 1

Assuming that "running the full loop" (scenario A) is faster than when you "manually runtime code" (scenario B), what appears to be happening is that, when the # of seconds in time_now is "01", the scenario A is fast enough to complete a few iterations with the # of seconds in time_now staying at "01", while scenario B is not.
If you slept for at least 1 second when the # of seconds in time_now was "01", that should prevent this, as it would change the # of seconds in time_now.