pip install py_yahoo

from py_yahoo import YWeather

yw=YWeather()

#set the location
#check the yahoo weather website for the list of supported cities
yw.weatherat("avinashi")

#set the unit 'c'-->celsius 'f'-->fahrenheit(default)
yw.unit("c")  

w=yw.getweather()

print(w.getatmosphere())   #{'humidity': '58', 'pressure': '1013.0', 'rising': '0', 'visibility': '16.1'}