pysnooper gen coro example

output.txt

Starting var:.. x = 1
Starting var:.. y = 2
13:50:40.798043 call        29 def fib(n):
13:50:40.798187 line        11     z = x + y
New var:....... z = 3
13:50:40.798215 line        12     a = x - y
New var:....... a = -1
13:50:40.798250 line        13     b = a + z
New var:....... b = 2
13:50:40.798271 line        14     result = await the_42()
    13:50:40.798287 call         4 async def the_42():
    13:50:40.798304 line         5     await asyncio.sleep(0.5)
    13:50:40.798389 return       5     await asyncio.sleep(0.5)
    Return value:.. <Future pending>
13:50:40.798437 return      14     result = await the_42()
Return value:.. <Future pending>
13:50:41.300428 call        14     result = await the_42()
    13:50:41.300597 call         5     await asyncio.sleep(0.5)
    13:50:41.300832 exception    5     await asyncio.sleep(0.5)
    13:50:41.300918 line         6     return 42
    13:50:41.300983 return       6     return 42
    Return value:.. 42
13:50:41.301095 exception   14     result = await the_42()
New var:....... result = 42
13:50:41.301229 line        15     return b // 2
13:50:41.301318 return      15     return b // 2
Return value:.. 1
Starting var:.. n = 5
13:50:41.808357 call        38 def foo(n):
13:50:41.808499 line        39     r = yield from(fib(n))
    Starting var:.. n = 5
    13:50:41.808664 call        29 def fib(n):
    13:50:41.808746 line        30     a, b = 0, 1
    New var:....... a = 0
    New var:....... b = 1
    13:50:41.808885 line        31     while n:
    13:50:41.808959 line        32         yield a
    13:50:41.809059 return      32         yield a
    Return value:.. 0
13:50:41.809182 return      39     r = yield from(fib(n))
Return value:.. 0
0
13:50:41.809351 call        39     r = yield from(fib(n))
    13:50:41.809438 call        32         yield a
    13:50:41.809516 line        33         a, b, n = b, a + b, n - 1
    Modified var:.. a = 1
    Modified var:.. n = 4
    13:50:41.809643 line        31     while n:
    13:50:41.809717 line        32         yield a
    13:50:41.809789 return      32         yield a
    Return value:.. 1
13:50:41.809881 return      39     r = yield from(fib(n))
Return value:.. 1
1
13:50:41.810056 call        39     r = yield from(fib(n))
    13:50:41.810142 call        32         yield a
    13:50:41.810219 line        33         a, b, n = b, a + b, n - 1
    Modified var:.. b = 2
    Modified var:.. n = 3
    13:50:41.810350 line        31     while n:
    13:50:41.810422 line        32         yield a
    13:50:41.810495 return      32         yield a
    Return value:.. 1
13:50:41.810585 return      39     r = yield from(fib(n))
Return value:.. 1
1
13:50:41.810728 call        39     r = yield from(fib(n))
    13:50:41.810806 call        32         yield a
    13:50:41.810879 line        33         a, b, n = b, a + b, n - 1
    Modified var:.. a = 2
    Modified var:.. b = 3
    Modified var:.. n = 2
    13:50:41.811022 line        31     while n:
    13:50:41.811091 line        32         yield a
    13:50:41.811162 return      32         yield a
    Return value:.. 2
13:50:41.811248 return      39     r = yield from(fib(n))
Return value:.. 2
2
13:50:41.811389 call        39     r = yield from(fib(n))
    13:50:41.811465 call        32         yield a
    13:50:41.811538 line        33         a, b, n = b, a + b, n - 1
    Modified var:.. a = 3
    Modified var:.. b = 5
    Modified var:.. n = 1
    13:50:41.811680 line        31     while n:
    13:50:41.811749 line        32         yield a
    13:50:41.811819 return      32         yield a
    Return value:.. 3
13:50:41.811904 return      39     r = yield from(fib(n))
Return value:.. 3
3
13:50:41.812042 call        39     r = yield from(fib(n))
    13:50:41.812118 call        32         yield a
    13:50:41.812191 line        33         a, b, n = b, a + b, n - 1
    Modified var:.. a = 5
    Modified var:.. b = 8
    Modified var:.. n = 0
    13:50:41.812336 line        31     while n:
    13:50:41.812405 line        34     return "BOO"
    13:50:41.812478 return      34     return "BOO"
    Return value:.. 'BOO'
13:50:41.812571 exception   39     r = yield from(fib(n))
New var:....... r = 'BOO'
13:50:41.812667 line        40     print("->", r)
-> BOO
13:50:41.812748 return      40     print("->", r)
Return value:.. None

test.py

from pysnooper import snoop


async def the_42():
    await asyncio.sleep(0.5)
    return 42


@snoop(depth=2)
async def foo(x, y):
    z = x + y
    a = x - y
    b = a + z
    result = await the_42()
    return b // 2


async def bar():
    for i in range(10):
        x = i
        await asyncio.sleep(0.1)


import asyncio
loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(foo(1, 2), bar()))


def fib(n):
    a, b = 0, 1
    while n:
        yield a
        a, b, n = b, a + b, n - 1
    return "BOO"


@snoop(depth=2)
def foo(n):
    r = yield from(fib(n))
    print("->", r)


for f in foo(5):
    print(f)