Data Validation. in PYTHON

Programe is:
#
#     Data validation
#     x is a positive number
#     y is the number in a set set SET
#     z is a number in a range (a; b)
#     w is less than A
#     v is a number greater than A
#     Function ispositive (x) return True if x is positive
#     Function isinset (y) return True if y is a member in SET
#     Function isinrange (z, a, b) return True if z <b and a <z
#     Function isless (w, A) return True if w <A
#     Function isgreather (v, B) return True if B <v
def ispositive(x):
    Beta = x.isdigit()
    if Beta == True:
        Gama = float(x)
    else:
        return False
    if Gama > 0:
        return True
    else:
        return false
X1 = '10'
print(ispositive(X1))
X2 = '-10'
print(ispositive(X2))
#
#  y is in set
#
def isinset(y, SET):
    Alfa = False
    for i in SET:
        if i == y:
            Alfa = True
    return Alfa
SET_1 = {1, 2, 3,4,5,6,7, 8, 9, 10}
Y1 = 7
print(isinset(Y1, SET_1))
Y2 = 100
print(isinset(Y2, SET_1))
#
#     z is in range
#
def isinrange(z, a, b):
    if z > a  and z < b:
        Gama = True
    else:
        Gama = False
    return Gama
Z1 = 5
A = 1
B = 10
Z2 =-10
Z3 = 100
print(isinrange(Z1, A, B))
print(isinrange(Z2, A, B))
print(isinrange(Z3, A, B))
#
#  w < A 
# 
def islessthan(w, A):
    Gama = False
    if w < A:
        Gama = True
    return Gama
W1 = 15
W2 = 100
A = 20
print(islessthan(W1, A))
print(islessthan(W2, A))
#
#   v > B
#
def isgreatherthan(v, B):
    Gama = False
    if v > B:
        Gama = True
    return Gama
V1 = 20
V2 = 5
B = 10
print(isgreatherthan(V1, B))
print(isgreatherthan(V2, B)) 
results are: 
============== RESTART: /Users/ionivan/Documents/DataValidation.py =============
True
False
True
False
True
False
False
True
False
True
False

(April 04,2022)