'**SUMMARY**
Checks whether two lines are parallel or not.
**RETURNS**
Bool. True or False
**EXAMPLE**
>>> img = Image("lenna")
>>> l = img.findLines()
>>> c = l[0].isParallel(l[1])'

def isParallel(self, line):

    if (self.slope == line.slope):
        return True
    return False
