circuitpython/tests/micropython/heapalloc.py

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# check that we can do certain things without allocating heap memory
import gc
def f(a):
print(a)
def g(a, b=2):
print(a, b)
global_var = 1
def h():
global global_var
global_var = 2 # set an existing global variable
for i in range(2): # for loop
f(i) # function call
f(i * 2 + 1) # binary operation with small ints
f(a=i) # keyword arguments
g(i) # default arg (second one)
g(i, i) # 2 args
# call h with heap allocation disabled and all memory used up
gc.disable()
try:
while True:
'a'.lower # allocates 1 cell for boundmeth
except MemoryError:
pass
h()
gc.enable()