#11080·poetry

Poetry 2.5.0/2.5.1 TypeError str instead of bytes-like object

Author: MindstanCreated Sep 21, 2026Updated Sep 29, 2026
Labelskind/bugarea/config

Description

Just after upgrading poetry (poetry self update or uninstall / install with script) from 1.4.3, poetry refuses every command excepted help with this error (see complete backtrace bellow):

$ poetry install --with dev,test

a bytes-like object is required, not 'str'
$ poetry self update

a bytes-like object is required, not 'str'

The error is happening with both poetry 2.5.0 and 2.5.1

Update: this error is caused by an undefined url field in config.toml for a repository.

Workarounds

Going back to 2.4.3 fixes the issue.

bash
curl -sSL https://install.python-poetry.org | python3 - --uninstall
curl -sSL https://install.python-poetry.org | python3 - --version 2.4.3

Poetry Installation Method

install.python-poetry.org

Operating System

Ubuntu 24.04 (KDE Plasma)

Poetry Version

2.5.1

Poetry Configuration

bash
cache-dir = "/home/<user>/.cache/pypoetry"
data-dir = "/home/<user>/.local/share/pypoetry"
installer.max-workers = null
installer.no-binary = null
installer.only-binary = null
installer.parallel = true
installer.re-resolve = false
keyring.enabled = true
python.installation-dir = "{data-dir}/python"  # /home/<user>/.local/share/pypoetry/python
repositories.pypi-internal.url = "https://pypi-internal.host/simple/"
repositories.pypi-internal-upload.url = "https://pypi-internal.host"
repositories.pypi-proxy.url = "https://pypi-proxy.host"
requests.max-retries = 0
solver.lazy-wheel = true
solver.min-release-age = 0
solver.min-release-age-exclude = null
solver.min-release-age-exclude-source = null
system-git-client = false
virtualenvs.create = true
virtualenvs.in-project = null
virtualenvs.options.always-copy = false
virtualenvs.options.no-pip = false
virtualenvs.options.system-site-packages = false
virtualenvs.path = "{cache-dir}/virtualenvs"  # /home/<user>/.cache/pypoetry/virtualenvs
virtualenvs.prompt = "{project_name}-py{python_version}"
virtualenvs.use-poetry-python = false

Python Sysconfig

sysconfig.log
Platform: "linux-x86_64"
Python version: "3.12"
Current installation scheme: "venv"

Paths: 
      data = "/home/<user>/.local/share/pypoetry/venv"
      include = "/home/<user>/.pyenv/versions/3.12.12/include/python3.12"
      platinclude = "/home/<user>/.pyenv/versions/3.12.12/include/python3.12"
      platlib = "/home/<user>/.local/share/pypoetry/venv/lib/python3.12/site-packages"
      platstdlib = "/home/<user>/.local/share/pypoetry/venv/lib/python3.12"
      purelib = "/home/<user>/.local/share/pypoetry/venv/lib/python3.12/site-packages"
      scripts = "/home/<user>/.local/share/pypoetry/venv/bin"
      stdlib = "/home/<user>/.pyenv/versions/3.12.12/lib/python3.12"

Variables: 
      ABIFLAGS = ""
      AC_APPLE_UNIVERSAL_BUILD = "0"
      AIX_BUILDDATE = "0"
      AIX_GENUINE_CPLUSPLUS = "0"
      ALIGNOF_LONG = "8"
      ALIGNOF_MAX_ALIGN_T = "16"
      ALIGNOF_SIZE_T = "8"
      ALT_SOABI = "0"
      ANDROID_API_LEVEL = "0"
      AR = "ar"
      ARFLAGS = "rcs"
      BASECFLAGS = "-fno-strict-overflow -Wsign-compare"
      BASECPPFLAGS = ""
      BASEMODLIBS = ""
      BINDIR = "/home/<user>/.pyenv/versions/3.12.12/bin"
      BINLIBDEST = "/home/<user>/.pyenv/versions/3.12.12/lib/python3.12"
      BLDLIBRARY = "-L. -lpython3.12"
      BLDSHARED = "gcc -shared -L/home/<user>/.pyenv/versions/3.12.12/lib -Wl,-rpath,/home/<user>/.pyenv/versions/3.12.12/lib -L/home/<user>/.pyenv/versions/3.12.12/lib -Wl,-rpath,/home/<user>/.pyenv/versions/3.12.12/lib"
      BOOTSTRAP_HEADERS = "\"
      BUILDEXE = ""
      BUILDPYTHON = "python"
      BUILD_GNU_TYPE = "x86_64-pc-linux-gnu"
      BUILD_SCRIPTS_DIR = "build/scripts-3.12"
      BYTESTR_DEPS = "\"
      CC = "gcc"
      CCSHARED = "-fPIC"
      CFLAGS = "-fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall"
      CFLAGSFORSHARED = "-fPIC"
      CFLAGS_ALIASING = ""
      CFLAGS_NODIST = ""
      CODECS_COMMON_HEADERS = "./Modules/cjkcodecs/multibytecodec.h ./Modules/cjkcodecs/cjkcodecs.h"
      COMPILEALL_OPTS = "-j0"
      CONFIGFILES = "configure configure.ac acconfig.h pyconfig.h.in Makefile.pre.in"
      CONFIGURE_CFLAGS = ""
      CONFIGURE_CFLAGS_NODIST = "-std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden"
      CONFIGURE_CPPFLAGS = "-I/home/<user>/.pyenv/versions/3.12.12/include"
      CONFIGURE_LDFLAGS = "-L/home/<user>/.pyenv/versions/3.12.12/lib -Wl,-rpath,/home/<user>/.pyenv/versions/3.12.12/lib"
      CONFIGURE_LDFLAGS_NODIST = ""
      CONFIGURE_LDFLAGS_NOLTO = ""
      CONFIG_ARGS = "'--prefix=/home/<user>/.pyenv/versions/3.12.12' '--libdir=/home/<user>/.pyenv/versions/3.12.12/lib' '--enable-shared' 'LDFLAGS=-L/home/<user>/.pyenv/versions/3.12.12/lib -Wl,-rpath,/home/<user>/.pyenv/versions/3.12.12/lib' 'LIBS=-L/home/<user>/.pyenv/versions/3.12.12/lib -Wl,-rpath,/home/<user>/.pyenv/versions/3.12.12/lib' 'CPPFLAGS=-I/home/<user>/.pyenv/versions/3.12.12/include'"
      CONFINCLUDEDIR = "/home/<user>/.pyenv/versions/3.12.12/include"
      CONFINCLUDEPY = "/home/<user>/.pyenv/versions/3.12.12/include/python3.12"
      COREPYTHONPATH = ""
      COVERAGE_INFO = "/tmp/python-build.20260119145003.58035/Python-3.12.12/coverage.info"
      COVERAGE_LCOV_OPTIONS = "--rc lcov_branch_coverage=1"
      COVERAGE_REPORT = "/tmp/python-build.20260119145003.58035/Python-3.12.12/lcov-report"
      COVERAGE_REPORT_OPTIONS = "--rc lcov_branch_coverage=1 --branch-coverage --title "CPython 3.12 LCOV report [commit $(shell )]""
      CPPFLAGS = "-I. -I./Include -I/home/<user>/.pyenv/versions/3.12.12/include -I/home/<user>/.pyenv/versions/3.12.12/include"
      CXX = "g++"
      DEEPFREEZE_C = "Python/deepfreeze/deepfreeze.c"
      DEEPFREEZE_DEPS = "./Tools/build/deepfreeze.py _bootstrap_python ./Programs/_freeze_module.py \"
      DEEPFREEZE_OBJS = "Python/deepfreeze/deepfreeze.o"
      DESTDIRS = "/home/<user>/.pyenv/versions/3.12.12 /home/<user>/.pyenv/versions/3.12.12/lib /home/<user>/.pyenv/versions/3.12.12/lib/python3.12 /home/<user>/.pyenv/versions/3.12.12/lib/python3.12/lib-dynload"
      DESTLIB = "/home/<user>/.pyenv/versions/3.12.12/lib/python3.12"
      DESTPATH = ""
      DESTSHARED = "/home/<user>/.pyenv/versions/3.12.12/lib/python3.12/lib-dynload"
      DFLAGS = ""
      DIRMODE = "755"
      DIST = "README.rst ChangeLog configure configure.ac acconfig.h pyconfig.h.in Makefile.pre.in Include Lib Misc Ext-dummy"
      DISTDIRS = "Include Lib Misc Ext-dummy"
      DISTFILES = "README.rst ChangeLog configure configure.ac acconfig.h pyconfig.h.in Makefile.pre.in"
      DLINCLDIR = "."
      DLLLIBRARY = ""
      DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754 = "0"
      DOUBLE_IS_BIG_ENDIAN_IEEE754 = "0"
      DOUBLE_IS_LITTLE_ENDIAN_IEEE754 = "1"
      DSYMUTIL = ""
      DSYMUTIL_PATH = ""
      DTRACE = ""
      DTRACE_DEPS = "\"
      DTRACE_HEADERS = ""
      DTRACE_OBJS = ""
      DYNLOADFILE = "dynload_shlib.o"
      ENABLE_IPV6 = "1"
      ENSUREPIP = "upgrade"
      EXE = ""
      EXEMODE = "755"
      EXENAME = "/home/<user>/.pyenv/versions/3.12.12/bin/python3.12"
      EXPORTSFROM = ""
      EXPORTSYMS = ""
      EXTRATESTOPTS = ""
      EXTRA_CFLAGS = ""
      EXT_SUFFIX = ".cpython-312-x86_64-linux-gnu.so"
      FILEMODE = "644"
      FREEZE_MODULE = "./_bootstrap_python ./Programs/_freeze_module.py"
      FREEZE_MODULE_BOOTSTRAP = "./Programs/_freeze_module"
      FREEZE_MODULE_BOOTSTRAP_DEPS = "Programs/_freeze_module"
      FREEZE_MODULE_DEPS = "_bootstrap_python ./Programs/_freeze_module.py"
      FROZEN_FILES_IN = "\"
      FROZEN_FILES_OUT = "\"
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      GITBRANCH = ""
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      HAVE_SIGWAITINFO = "1"
      HAVE_SNPRINTF = "1"
      HAVE_SOCKADDR_ALG = "1"
      HAVE_SOCKADDR_SA_LEN = "0"
      HAVE_SOCKADDR_STORAGE = "1"
      HAVE_SOCKET = "1"
      HAVE_SOCKETPAIR = "1"
      HAVE_SPAWN_H = "1"
      HAVE_SPLICE = "1"
      HAVE_SSIZE_T = "1"
      HAVE_STATVFS = "1"
      HAVE_STAT_TV_NSEC = "1"
      HAVE_STAT_TV_NSEC2 = "0"
      HAVE_STDINT_H = "1"
      HAVE_STDIO_H = "1"
      HAVE_STDLIB_H = "1"
      HAVE_STD_ATOMIC = "1"
      HAVE_STRFTIME = "1"
      HAVE_STRINGS_H = "1"
      HAVE_STRING_H = "1"
      HAVE_STRLCPY = "1"
      HAVE_STROPTS_H = "0"
      HAVE_STRSIGNAL = "1"
      HAVE_STRUCT_PASSWD_PW_GECOS = "1"
      HAVE_STRUCT_PASSWD_PW_PASSWD = "1"
      HAVE_STRUCT_STAT_ST_BIRTHTIME = "0"
      HAVE_STRUCT_STAT_ST_BLKSIZE = "1"
      HAVE_STRUCT_STAT_ST_BLOCKS = "1"
      HAVE_STRUCT_STAT_ST_FLAGS = "0"