def test_split_buffer():
s = Split([ascii_lowercase, ascii_uppercase])
LOW_UP = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
assert "".join(s()) == LOW_UP
s = Split([ascii_lowercase, ascii_uppercase], bufsize=1)
# bufsize makes no difference, because these are Sources, not Sequences
assert "".join(s.run([])) == LOW_UP
assert "".join(s.run([0])) == LOW_UP
# test Split in Source
s = Source(ascii_lowercase,
Split([lambda s: s.upper(), lambda s: s.lower()]))
assert "".join(
s()) == "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
s = Source(ascii_lowercase,
Split([lambda s: s.upper(), lambda s: s.lower()], bufsize=1))
assert "".join(
s()) == "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
# bufsize = None or 1000 does not matter
s = Source(ascii_lowercase,
Split([lambda s: s.upper(), lambda s: s.lower()], bufsize=None))
assert "".join(
s()) == "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
def test_cache():
lowercase_cached_seq[0].drop_cache()
s = Source(ascii_lowercase, lowercase_cached_seq)
assert "".join(s()) == "abcdefghijklmnopqrstuvwxyz"
# cache is actually used
s = Source(ascii_uppercase, lowercase_cached_seq)
assert "".join(s()) == "abcdefghijklmnopqrstuvwxyz"
lowercase_cached_seq[0].drop_cache()
def test_print(capsys):
# this is one of my very first tests, so it's a bit complicated
# mocker.patch('__future__.print')
it5 = lambda: Slice(5)
printel = Print(end=' ')
seq1 = Source(lena.flow.CountFrom(0), printel, it5())
[print(val, sep=" ", end=" ") for val in seq1()]
captured = capsys.readouterr()
assert captured.out == "0 0 1 1 2 2 3 3 4 4 "
seq2 = Source(lena.flow.CountFrom(0), printel, it5(), lena.flow.End())
list(seq2())
captured = capsys.readouterr()
assert captured.out == "0 1 2 3 4 "
def test_count_from():
s = Source(
CountFrom(),
# lambda i: (i, {str(i): i}),
# DropContext(
# Slice(5),
# lambda i: i + 1,
# ),
Slice(10),
)
results = s()
assert [result for result in s()] == list(range(10))
# [
# (1, {'0': 0}), (2, {'1': 1}), (3, {'2': 2}), (4, {'3': 3}), (5, {'4': 4})
# ]
# test start
it = CountFrom(start=10)
assert list(islice(it(), 5)) == list(range(10, 15))
# test step
it = CountFrom(step=2)
assert list(islice(it(), 5)) == list(range(0, 10, 2))
# test start and step
it = CountFrom(start=10, step=2)
assert list(islice(it(), 5)) == list(range(10, 20, 2))
def main():
write = Write("output")
s = Source(
get_filenames,
GetCoordinates(),
Split([
(
Variable("x", lambda coord: coord[0]),
Histogram(lena.math.mesh((-10, 10), 100)),
),
(
Variable("y",
lambda coord: coord[1],
latex_name="y",
unit="mm"),
Histogram(lena.math.mesh((-10, 10), 100)),
),
]),
MakeFilename("{{variable.name}}"),
# UpdateContext("output.filename", "x"),
ToCSV(),
write,
RenderLaTeX("histogram_1d.tex"),
write,
LaTeXToPDF(),
PDFToPNG(),
)
return s()
def main():
s = Sequence(lambda i: pow(-1, i) * (2 * i + 1), )
results = s.run([0, 1, 2, 3])
for res in results:
print(res, end=" ")
# 1 -3 5 -7
#
# s0 = Source(
# lena.flow.CountFrom(0),
# s,
# lena.flow.Slice(5),
# )
# results = s0()
# print(list(results))
spi = Source(
lena.flow.CountFrom(0),
s,
lena.flow.Slice(10**6),
lambda x: 4. / x,
Sum(),
)
results = list(spi())
print(results)
# [3.1415916535897743]
return results
def test_fill_request_seq():
s1 = Source(
ones,
FillRequestSeq(FillRequest(Sum(start=0),
reset=False,
buffer_input=True),
reset=False,
buffer_input=True,
bufsize=1), Slice(10))
assert list(s1()) == list(range(1, 11))
def test_cache_2():
# works well in sequence
s1 = Source(
cnt1,
Slice(2),
Cache("cache.tmp"),
)
res1 = [result for result in s1()]
assert len(res1) == 2
assert res1 == [1, 2]
# works well after cached
s2 = Source(
cnt1,
Cache("cache.tmp"),
)
res2 = [result for result in s2()]
assert res1 == res2
# works well with later elements in sequence
s3 = Source(
cnt1,
Cache("cache.tmp"),
Slice(1),
)
res3 = [result for result in s3()]
assert res3 != res2
assert res2 == res3 + [2]
# works well for flow with context
s4c = Source(
cnt1c,
Slice(2),
Cache("cache_c.tmp"),
)
res4 = [result for result in s4c()]
assert res4 == [(1, {'1': 1}), (2, {'2': 2})]
# clean up
os.remove("cache.tmp")
os.remove("cache_c.tmp")
def test_source():
it5 = Slice(5)
sseq = Source(cnt0, it5)
assert list(sseq()) == [0, 1, 2, 3, 4]
## Test special double underscore methods, emulating a container.
# can create a list from that
seq2 = Source(*list(sseq))
# can take len
assert len(seq2) == 2
# can get item
assert callable(seq2[0])
# deletion is prohibited
with pytest.raises(TypeError):
del seq2[0]
# setting elements is prohibited
with pytest.raises(TypeError):
seq2[0] = 0
with pytest.raises(lena.core.LenaTypeError):
s = Source()
with pytest.raises(lena.core.LenaTypeError):
s = Source(1)
def test_sequence():
it5 = Slice(5)
sseq = Source(cnt0, it5)
assert list(sseq()) == [0, 1, 2, 3, 4]
seq = Sequence(RunIf(int, lambda i: i + 1))
print(list(seq.run(sseq())))
# Test special double underscore methods,
# emulating a container.
# can create a list from that
seq2 = Sequence(*list(seq))
# can take len
assert len(seq2) == 1
# can get item
assert isinstance(seq2[0], RunIf)
# deletion is prohibited
# I don't know why, but last time both exceptions below were AttributeError
# it changed after I based Sequence on LenaSequence
# (based on object, which was not before).
with pytest.raises(TypeError):
del seq2[0]
# setting elements is prohibited
with pytest.raises(TypeError):
seq2[0] = 0
def test_sequence_init():
it5 = Slice(5)
sseq = Source(cnt0, it5)
with pytest.raises(LenaTypeError):
sseq = Source(cnt0, it5, ())
import string
from lena.core import Source, Sequence
from lena.flow import Cache
class ASCIILowercase(object):
"""abcdefghijklmnopqrstuvwxyz"""
def __call__(self):
for s in string.ascii_lowercase:
yield s
class ASCIIUppercase(object):
def __call__(self):
for s in string.ascii_uppercase:
yield s
ascii_lowercase = Source(ASCIILowercase())
ascii_uppercase = Source(ASCIIUppercase())
# The Sequence's cache will be in the directory
# from which the module is called, not where this file is!
lowercase_cached_filename = "lowercase_cached.pkl"
lowercase_cached_seq = Sequence(Cache(lowercase_cached_filename))
## fill the cache - need to convert to list that first.
#lowercase_cached_seq.run(list(ascii_lowercase()))
id_ = lambda val: val
def test_fill_request():
# todo: modify Source to use iterables (incl. those from itertools)
# from itertools import repeat
def ones():
while True:
yield 1
## reset works
# reset=False works
s0 = Source(ones, Slice(10),
FillRequest(Sum(), reset=False, bufsize=1, buffer_input=True))
assert list(s0()) == list(range(1, 11))
# buffer_output works the same
s0o = Source(
ones, Slice(10),
FillRequest(Sum(), reset=False, bufsize=1, buffer_output=True))
assert list(s0o()) == list(range(1, 11))
# reset=True works
s10 = Source(ones, Slice(10),
FillRequest(Sum(), reset=True, bufsize=1, buffer_input=True))
assert list(s10()) == [1 for _ in range(10)]
# buffer_output works the same
s10o = Source(
ones, Slice(10),
FillRequest(Sum(), reset=True, bufsize=1, buffer_output=True))
assert list(s10o()) == [1 for _ in range(10)]
# Slice can be moved after FR if bufsize=1
s11 = Source(ones,
FillRequest(Sum(), reset=True, bufsize=1, buffer_input=True),
Slice(10))
assert list(s11()) == [1 for _ in range(10)]
# bufsize 10
s1 = Source(CountFrom(), Slice(100),
FillRequest(Sum(), reset=False, bufsize=10, buffer_input=True))
results = list(s1())
assert results == [45, 190, 435, 780, 1225, 1770, 2415, 3160, 4005, 4950]
# bufsize 1
s2 = Source(CountFrom(), Slice(10),
FillRequest(Sum(), reset=False, bufsize=1, buffer_input=True))
results = list(s2())
assert results == [0, 1, 3, 6, 10, 15, 21, 28, 36, 45]
# derive from FillCompute
s3 = Source(CountFrom(), Slice(10),
FillRequest(Sum(), bufsize=1., reset=True, buffer_input=True))
results = list(s3())
assert results == [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
# run works correctly
class MyRun():
def fill(self, val):
pass
def request(self):
pass
def reset(self):
pass
def run(self, flow):
for val in flow:
yield True
fr = FillRequest(MyRun(), buffer_input=True, reset=True)
results = list(fr.run(iter([1])))
assert results == [True]
results = list(fr.run(iter([])))
assert results == []
## run for empty flow should yield nothing
fr = FillRequest(Sum(), reset=True, buffer_input=True)
# nothing if yield_on_remainder is false
assert list(fr.run([])) == []
# nothing for yield_on_remainder=True
# - because no remainder is not a remainder.
fr = FillRequest(Sum(),
yield_on_remainder=True,
reset=True,
buffer_input=True)
assert list(fr.run([])) == []
def test_split_sequence_with_cache():
lowercase_cached_seq[0].drop_cache()
s = Source(ascii_lowercase,
Split([lambda s: s.upper(), lowercase_cached_seq]))
# print(list(Cache(lowercase_cached_filename)._load_flow()))
# print(Call(Cache(lowercase_cached_filename), call="_load_flow")())
# print(list(Call(Cache(lowercase_cached_filename), call="_load_flow")()))
assert "".join(
s()) == "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
# cache is actually used
# Single Cache element
s = Source(ascii_uppercase,
Split([lambda s: s.upper(), lowercase_cached_seq]))
assert "".join(
s()) == "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
# Sequence with Cache
s = Source(
ascii_uppercase,
Split([lambda s: s.upper(), (lambda val: val, lowercase_cached_seq)]))
assert "".join(
s()) == "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
# sequences are called in the order they were initialized in Source
s = Source(
ascii_uppercase,
Split([
lambda s: s.upper(),
(lambda val: val, Cache(lowercase_cached_filename)), id_
]))
assert "".join(s()) == \
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
lowercase_cached_seq[0].drop_cache()
def test_fill_compute_seq():
# wrong initialization
# no FillCompute element
with pytest.raises(LenaTypeError):
FillComputeSeq(lambda x: x)
# Run can't be cast to a FillInto element
with pytest.raises(LenaTypeError):
FillComputeSeq(Run(Mean()), Mean())
s1 = Source(cnt1, mul2, Slice(10), FillCompute(Mean()))
assert next(s1()) == 11.
s2 = Source(cnt1, Slice(10), FillComputeSeq(Mean(), mul2))
assert list(s2()) == [11.]
s3 = Source(cnt1, Slice(10), FillComputeSeq(mul2, FillCompute(Mean())))
assert next(s3()) == 11.0
s4 = Source(cnt1, Slice(10),
FillComputeSeq(mul2, FillCompute(Mean()), Print()))
# tuple initialization works
s41 = Source(cnt1, Slice(10),
FillComputeSeq((mul2, FillCompute(Mean()), Print())))
assert next(s4()) == 11.0
assert next(s41()) == 11.0
# 11.0
s5 = FillComputeSeq(mul2, FillCompute(Mean()), Print())
assert is_fill_compute_seq(Mean())
# Source is not fill_compute_seq. It's also non-iterable.
assert not is_fill_compute_seq(s4)
# Test Source containing FillComputeSeq
# test LenaSequence
# can take len
assert len(s1) == 4
assert len(s2) == 3
assert len(s3) == 3
assert len(s4) == 3
# can get item
assert isinstance(s2[1], Slice)
# Test FillComputeSeq
assert len(s5) == 3
# can get item
assert isinstance(s5[1], FillCompute)
# deletion is prohibited
with pytest.raises(TypeError):
del s5[0]
# setting elements is prohibited
with pytest.raises(TypeError):
s5[0] = 0
# wrong subclass
class MyFC(FillComputeSeq):
def __init__(self):
pass
myfc = MyFC()
with pytest.raises(LenaNotImplementedError):
myfc.fill(0)
def test_fill_request_seq_old():
# FillRequest with preprocess works
# how not to write tests. Unclear what the result should be.
# But I remember that I carefully checked that when written.
# yes, really 3 reset=False, because 3 explicit FillRequests.
s1 = Source(
cnt1,
# this FillRequest is optional
FillRequest(
FillRequestSeq(
lambda x: x - 1,
FillRequest(Sum(start=0), reset=False, buffer_input=True),
reset=False,
buffer_input=True,
),
buffer_input=True,
reset=False,
),
Slice(10))
assert list(s1()) == [0, 1, 3, 6, 10, 15, 21, 28, 36, 45]
# FR with postprocess works
s2 = Source(
cnt1,
FillRequestSeq(FillRequest(Sum(start=0),
reset=False,
buffer_input=True),
lambda x: x - 1,
reset=False,
buffer_input=True), Slice(10))
assert list(s2()) == [0, 2, 5, 9, 14, 20, 27, 35, 44, 54]
# bufsize initialization works
frs = FillRequestSeq(FillRequest(Sum(), reset=True, buffer_input=True),
buffer_input=True,
reset=False)
assert frs._fr.bufsize == 1
frs2 = FillRequestSeq(FillRequest(Sum(), reset=True, buffer_input=True),
bufsize=2,
buffer_input=True,
reset=True)
assert frs2._fr.bufsize == 2
# wrong keyword raises
# this is a TypeError now, since kwargs are passed to FillRequest
with pytest.raises(TypeError):
# with pytest.raises(LenaTypeError):
FillRequestSeq(FillRequest(Sum(), reset=True, buffer_input=True),
unknown=True,
buffer_input=True,
reset=False)
# wrong subclassing raises (need to implement fill)
class MyFR(FillRequestSeq):
def __init__(self):
pass
myfr = MyFR()
with pytest.raises(LenaNotImplementedError):
myfr.fill(0)
# fill with preprocess works
flow = list(range(0, 4))
s3 = FillRequestSeq(lambda x: x - 1,
FillRequest(Sum(), reset=True, buffer_input=True),
reset=True,
buffer_input=True)
for val in flow:
s3.fill(val)
assert list(s3.request()) == [-1, 0, 1, 2]
# the old value was just the final value.
# Now we yield results for each buffer.
# assert list(s3.request()) == [2]
# direct fill works
s4 = FillRequestSeq(FillRequest(Sum(), reset=False, buffer_input=True),
reset=False,
buffer_input=True)
for val in flow:
s4.fill(val)
assert list(s4.request()) == [0, 1, 3, 6]