x=1 def a(): print("hello") print(a,id(a),id(x)) a() a=10 print(a,x) del(a,x) x=1 print(type(x)) x=1.0 print(type(x)) x="hello" print(type(x)) x="2" print(float(x)) print(type(x)) x=True y=False z="hello" print(type(x),type(y),type(z)) print(int(x),int(y)) d="""3ihgiahjgi iajgie jngioer gjinagiern gianiogjoiejsl injnoigjio ingoahng oai iaongioajgnioe ioaijniojiojiojiojoj i jiojiojiojiojoijoaj jiojio oi""" e='i\'m john' print(e) e='i\'m \t:\man john' print(e,e,sep='\t') if 5 > 2: print("Five is greater than two!") x='1000' print(x.isalnum()) x='1000.aver' print(x.isalnum()) x=False print(x==1) #bool internal value True/1 False/0 result=None or False or 0 or 0.0 print(result) result=None or False or'' or 0 or 0.0 or [] or {} #falsy value print(result) result=True or False or'' or 0 or 0.0 or [] or {} #falsy value print(result) result=True and 1 and 1.0 and [1] and {'a':1} and 'jh' # truthy value print(result) default = "KW" city = 'tw' city = city or print("please input city") or default print(city) default = "KW" city = '' city = city or print("please input city") or default print(city) print(print("something")) print(bool(city)) print(bool(print("something"))) city = '' city = city or print("please input city") print(city) print(0.5-0.4) print(0.1+0.1+0.1)