diff options
| -rwxr-xr-x | test/functional/test_framework/messages.py | 4 | ||||
| -rwxr-xr-x | test/functional/wallet_importmulti.py | 4 | ||||
| -rwxr-xr-x | test/lint/lint-python-mutable-default-parameters.sh | 52 |
3 files changed, 58 insertions, 2 deletions
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py index 89a5a65e64..917efaa833 100755 --- a/test/functional/test_framework/messages.py +++ b/test/functional/test_framework/messages.py @@ -803,7 +803,9 @@ class HeaderAndShortIDs: return [ key0, key1 ] # Version 2 compact blocks use wtxid in shortids (rather than txid) - def initialize_from_block(self, block, nonce=0, prefill_list = [0], use_witness = False): + def initialize_from_block(self, block, nonce=0, prefill_list=None, use_witness=False): + if prefill_list is None: + prefill_list = [0] self.header = CBlockHeader(block) self.nonce = nonce self.prefilled_txn = [ PrefilledTransaction(i, block.vtx[i]) for i in prefill_list ] diff --git a/test/functional/wallet_importmulti.py b/test/functional/wallet_importmulti.py index e4a4ab1f35..23748e5dd7 100755 --- a/test/functional/wallet_importmulti.py +++ b/test/functional/wallet_importmulti.py @@ -44,8 +44,10 @@ class ImportMultiTest(BitcoinTestFramework): def setup_network(self): self.setup_nodes() - def test_importmulti(self, req, success, error_code=None, error_message=None, warnings=[]): + def test_importmulti(self, req, success, error_code=None, error_message=None, warnings=None): """Run importmulti and assert success""" + if warnings is None: + warnings = [] result = self.nodes[1].importmulti([req]) observed_warnings = [] if 'warnings' in result[0]: diff --git a/test/lint/lint-python-mutable-default-parameters.sh b/test/lint/lint-python-mutable-default-parameters.sh new file mode 100755 index 0000000000..1f9f035d30 --- /dev/null +++ b/test/lint/lint-python-mutable-default-parameters.sh @@ -0,0 +1,52 @@ +#!/usr/bin/env bash +# +# Copyright (c) 2019 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. +# +# Detect when a mutable list or dict is used as a default parameter value in a Python function. + +export LC_ALL=C +EXIT_CODE=0 +OUTPUT=$(git grep -E '^\s*def [a-zA-Z0-9_]+\(.*=\s*(\[|\{)' -- "*.py") +if [[ ${OUTPUT} != "" ]]; then + echo "A mutable list or dict seems to be used as default parameter value:" + echo + echo "${OUTPUT}" + echo + cat << EXAMPLE +This is how mutable list and dict default parameter values behave: + +>>> def f(i, j=[], k={}): +... j.append(i) +... k[i] = True +... return j, k +... +>>> f(1) +([1], {1: True}) +>>> f(1) +([1, 1], {1: True}) +>>> f(2) +([1, 1, 2], {1: True, 2: True}) + +The intended behaviour was likely: + +>>> def f(i, j=None, k=None): +... if j is None: +... j = [] +... if k is None: +... k = {} +... j.append(i) +... k[i] = True +... return j, k +... +>>> f(1) +([1], {1: True}) +>>> f(1) +([1], {1: True}) +>>> f(2) +([2], {2: True}) +EXAMPLE + EXIT_CODE=1 +fi +exit ${EXIT_CODE} |