function motivated by the lack of an Optional Chaining, safe Navigation operator (?, proposed in PEP-505)

safe_access.py

def safe_access(fn):
    try:
        return fn()
    except (TypeError, KeyError, IndexError, AttributeError):
        return None

# usage:

class Person:
    def __init__(self, name, age, profession):
        self.name = name
        self.age = age
        self.profession = profession

class Profession:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary
    
    def format_profession(self, st1, st2):
        return f"{st1}-{self.name}-{st2}"

p1 = Person("Francois", 4, Profession("programmer", 50000))

print(safe_access(lambda: p1.name))
print(safe_access(lambda: p1.city))
print(safe_access(lambda: p1.city.name))
print(safe_access(lambda: p1.profession.salary))
print(safe_access(lambda: p1.profession.format_profession("¡¡", "!!").upper()[:6]))

# invoking a non callable
print(safe_access(lambda: p1.profession.salary()))