setup cython linting (#851)

.pre-commit-config.yaml

@@ -37,6 +37,11 @@ repos:
         exclude: 'site_scons/'
         args:
         - --disable=C,R,W0613,W0511,W0212,W0201,W0311,W0106,W0603,W0621,W0703,E1136
+-   repo: https://github.com/MarcoGorelli/cython-lint
+    rev: v0.15.0
+    hooks:
+    -   id: cython-lint
+    -   id: double-quote-cython-strings
 -   repo: https://github.com/cpplint/cpplint
     rev: 1.6.1
     hooks:

can/common.pxd

@@ -3,10 +3,8 @@
 
 from libc.stdint cimport uint8_t, uint16_t, uint32_t, uint64_t
 from libcpp cimport bool
-from libcpp.map cimport map
 from libcpp.string cimport string
 from libcpp.vector cimport vector
-from libcpp.unordered_set cimport unordered_set
 
 
 ctypedef unsigned int (*calc_checksum_type)(uint32_t, const Signal&, const vector[uint8_t] &)
@@ -54,7 +52,6 @@ cdef extern from "common_dbc.h":
     uint32_t address
     string name
 
-
   cdef struct MessageParseOptions:
     uint32_t address
     int check_frequency
@@ -72,7 +69,7 @@ cdef extern from "common_dbc.h":
 
 
 cdef extern from "common.h":
-  cdef const DBC* dbc_lookup(const string);
+  cdef const DBC* dbc_lookup(const string)
 
   cdef cppclass CANParser:
     bool can_valid

can/packer_pyx.pyx

@@ -1,12 +1,10 @@
 # distutils: language = c++
 # cython: c_string_encoding=ascii, language_level=3
 
-from libc.stdint cimport uint8_t, uint32_t, uint64_t
+from libc.stdint cimport uint8_t
 from libcpp.vector cimport vector
 from libcpp.map cimport map
 from libcpp.string cimport string
-from libcpp cimport bool
-from posix.dlfcn cimport dlopen, dlsym, RTLD_LAZY
 
 from .common cimport CANPacker as cpp_CANPacker
 from .common cimport dbc_lookup, SignalPackValue, DBC
@@ -36,7 +34,7 @@ cdef class CANPacker:
     cdef SignalPackValue spv
 
     for name, value in values.iteritems():
-      spv.name = name.encode('utf8')
+      spv.name = name.encode("utf8")
       spv.value = value
       values_thing.push_back(spv)
 
@@ -48,7 +46,7 @@ cdef class CANPacker:
       addr = name_or_addr
       size = self.address_to_size[name_or_addr]
     else:
-      addr, size = self.name_to_address_and_size[name_or_addr.encode('utf8')]
+      addr, size = self.name_to_address_and_size[name_or_addr.encode("utf8")]
 
     cdef vector[uint8_t] val = self.pack(addr, values)
     return [addr, 0, (<char *>&val[0])[:size], bus]

can/parser_pyx.pyx

@@ -5,14 +5,12 @@ from cython.operator cimport dereference as deref, preincrement as preinc
 from libcpp.string cimport string
 from libcpp.vector cimport vector
 from libcpp.unordered_set cimport unordered_set
-from libc.stdint cimport uint32_t, uint64_t, uint16_t
-from libcpp cimport bool
+from libc.stdint cimport uint32_t
 from libcpp.map cimport map
 
 from .common cimport CANParser as cpp_CANParser
 from .common cimport SignalParseOptions, MessageParseOptions, dbc_lookup, SignalValue, DBC
 
-import os
 import numbers
 from collections import defaultdict
 
@@ -46,7 +44,7 @@ cdef class CANParser:
 
     for i in range(self.dbc[0].msgs.size()):
       msg = self.dbc[0].msgs[i]
-      name = msg.name.decode('utf8')
+      name = msg.name.decode("utf8")
 
       msg_name_to_address[name] = msg.address
       self.address_to_msg_name[msg.address] = name
@@ -81,7 +79,7 @@ cdef class CANParser:
       signal_addrs = {s[1] for s in signals}
       unchecked = signal_addrs - checked_addrs
       if len(unchecked):
-        err_msg = ', '.join(f"{self.address_to_msg_name[addr].decode()} ({hex(addr)})" for addr in unchecked)
+        err_msg = ", ".join(f"{self.address_to_msg_name[addr].decode()} ({hex(addr)})" for addr in unchecked)
         raise RuntimeError(f"Unchecked addrs: {err_msg}")
 
     cdef vector[SignalParseOptions] signal_options_v
@@ -106,7 +104,7 @@ cdef class CANParser:
 
   def update_strings(self, strings, sendcan=False):
     for v in self.vl_all.values():
-      for l in v.values():
+      for l in v.values():  # no-cython-lint
         l.clear()
 
     cdef vector[SignalValue] new_vals
@@ -154,7 +152,7 @@ cdef class CANDefine():
 
     for i in range(self.dbc[0].msgs.size()):
       msg = self.dbc[0].msgs[i]
-      name = msg.name.decode('utf8')
+      name = msg.name.decode("utf8")
       address = msg.address
       address_to_msg_name[address] = name
 
@@ -163,8 +161,8 @@ cdef class CANDefine():
     for i in range(self.dbc[0].vals.size()):
       val = self.dbc[0].vals[i]
 
-      sgname = val.name.decode('utf8')
-      def_val = val.def_val.decode('utf8')
+      sgname = val.name.decode("utf8")
+      def_val = val.def_val.decode("utf8")
       address = val.address
       msgname = address_to_msg_name[address]
 

pyproject.toml

@@ -0,0 +1,8 @@
+name = "opendbc"
+license = "MIT"
+readme = "README.md"
+repository = "https://github.com/commaai/opendbc"
+
+[tool.cython-lint]
+max-line-length = 120
+ignore = ["E111", "E114"]