pt = [{'min': 1.158, 'max': 1.150, 'id': 269097, 'to': 1532003820, 'from': 1532003760, 'check': 1.15852, 'no_check': 1.15822, 'volume': 0},{'min': 1.1, 'max': 1.17, 'id': 269098, 'to': 1532003880, 'from': 1532003820, 'check': 1.158615, 'nocheck': 1.158515, 'volume': 0}]

y = [item[0] for item in pt]
z = [item[0] for item in pt]
print(y)
print(z)

File "test_YourM.py", line 19, in <module>
    y = [item[0][0] for item in pt]
  File "test_YourM.py", line 19, in <listcomp>
    y = [item[0][0] for item in pt]
KeyError: 0