I suck at coding need some help

Good news is decimal to binary and binary to decimal seem to work fine. The only one that seems to have a problem is decimal to hexadecimal.

Code:

def decToHex():
    #Get number from user
    number=int(input("enter a postive number ")#Missing a parenthesis
    if(number is<= 0) #What's that is doing there? Also, need a colon
        0)#What's this?
        print("enter a postive number")
        if(number=0) #Should not be an assignment, also a colon
            print("the hexadecimal value of 0 equals 0")
    else #Colon needed here
        hstr=" "
        q=number
        while(q>0):
            if(q%16<10):
                hstr=str(q%16)+hstr
            elif(q%16==10):
                hstr="A"+hstr
            elif(q%16==11):
                hstr="B"+hstr
            elif(q%16==12):
                hstr="C"+hstr
            elif(q%16==13):
                hstr="D"+hstr
            elif(q%16==14):
                hstr="E"+hstr
            elif(q%16==15):
            else: #This else probably shouldn't be here
                hstr="F"+hstr
            q=q//16
    print(number, "converted to hexadecimal is " , hstr)

If you make the changes where I added comments it should compile.

I would also highly recommending downloading a good python IDE - I currently use PyCharm and it works pretty well.