Python | sympy.expand_func() method

With the help of sympy.expand_func() method, we can expand special functions in terms of some mathematical identities.

Syntax: expand_func(expression)

Parameter:
expression – It is mathematical expression which is to expanded.

Returns: Returns a mathematical expression corresponding to the input in terms of some mathematical identities.

Example #1:

# import sympy
from sympy import *

x = symbols('x')
expr = gamma(x + 3)
print("Expression = {}".format(expr))

# Use sympy.expand_func() method
expand_expr = expand_func(expr)

print("Expanded Expression : {}".format(expand_expr))

Output:

Expression = gamma(x + 3)
Expanded Expression : x*(x + 1)*(x + 2)*gamma(x)

Example #2:

# import sympy
from sympy import *

x = symbols('x')
expr = binomial(x, 3)
print("Expression = {}".format(expr))

# Use sympy.expand_func() method
expand_expr = expand_func(expr)

print("Expanded Expression : {}".format(expand_expr))

Output:

Expression = binomial(x, 3)
Expanded Expression : x*(x - 2)*(x - 1)/6