def parse(string):
if string in name_space:
value = name_space.get(string)
print value
else:
mat = Matrix()
l = string.replace(' ', '')
if l.find('=') != -1:
if l[2:] not in name_space and l.find('zeros') != -1:
zer = mat.matrix_creation_using_zeros(l[2:])
name_space[str(l[0])] = zer
elif l[3] not in name_space:
matr = mat.matrix_creation(l[2:])
name_space[str(l[0])] = matr
elif l[3] and l[5] in name_space:
if (l.find(',') != -1) or (l.find(';') != -1):
conc = mat.concat(l[2:])
name_space[str(l[0])] = conc
if l.find('+') != -1:
add = mat.add(l)
print add
if l.find("\'") != -1:
tr = mat.transposer(l)
print tr
if l.find('inv') != -1:
inv = mat.inverser(l[-2])
print inv
