diff --git a/components/xtensa/trax/traceparse.py b/components/xtensa/trax/traceparse.py deleted file mode 100644 index 119e4c9e88..0000000000 --- a/components/xtensa/trax/traceparse.py +++ /dev/null @@ -1,343 +0,0 @@ -#!/usr/bin/env python -# coding=utf-8 -# -# This script decodes Xtensa CPU trace dumps. It allows tracing the program -# execution at instruction level. -# -# Some trivia about the Xtensa CPU trace (TRAX): -# TRAX format mostly follows the IEEE-ISTO 5001-2003 (Nexus) standard. -# The following Nexus Program Trace messages are implemented by TRAX: -# - Indirect Branch Message -# - Syncronization Message -# - Indirect Branch with Synchronization Message -# - Correlation Message -# TRAX outputs compressed traces with 2 MSEO bits (LSB) and 6 MDO bits (MSB), -# packed into a byte. MSEO bits are used to split the stream into packets and messages, -# and MDO bits carry the actual data of the messages. Each message may contain multiple packets. -# -# This script can be used standalone, or loaded into GDB. -# When used standalone, it dumps the list of trace messages to stdout. -# When used from GDB, it also invokes GDB command to dump the list of assembly -# instructions corresponding to each of the messages. -# -# Standalone usage: -# traceparse.py -# -# Usage from GDB: -# xtensa-esp32-elf-gdb -n --batch program.elf -x gdbinit -# with the following gdbinit script: -# set pagination off -# set confirm off -# add-symbol-file rom.elf
-# source traceparse.py -# python parse_and_dump("/path/to/dump_file") -# -# Loading the ROM code is optional; if not loaded, disassembly for ROM sections of code -# will be missing. -# -### -# Copyright 2020 Espressif Systems (Shanghai) PTE LTD -# -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. -from __future__ import print_function -import sys - -# Check if loaded into GDB -try: - assert gdb.__name__ == "gdb" - WITH_GDB = True -except NameError: - WITH_GDB = False - -# MSEO bit masks: -MSEO_PKTEND = 1 << 0 # bit 0: indicates the last byte of a packet -MSEO_MSGEND = 1 << 1 # bit 1: indicates the last byte of the message - -# Message types. The type is stored in the first 6 MDO bits or the first packet. -TVAL_INDBR = 4 # Indirect branch -TVAL_INDBRSYNC = 12 # Indirect branch w/ synchronisation -TVAL_SYNC = 9 # Synchronisation msg -TVAL_CORR = 33 # Correlation message - - -class TraxPacket(object): - def __init__(self, data, truncated=False): - self.data = data - self.size_bytes = len(data) - self.truncated = truncated - - def get_bits(self, start, count=0): - """ - Extract data bits from the packet - :param start: offset, in bits, of the part to be extracted - :param count: number of bits to extract; if omitted or zero, - extracts until the end of the packet - :return: integer containing the extracted bits - """ - start_byte = start // 6 - if count <= 0: - # all remaining bits - count = len(self.data) * 6 - start - bits_remaining = count - result = 0 - shift = 0 - for i, b in enumerate(self.data[start_byte:]): - # which bit in the byte is the starting bit - if i == 0: - # at start_byte: take the offset into account - start_bit = 2 + (start % 6) - else: - # every other byte: start after MSEO bits - start_bit = 2 - # how many bits do we need to copy from this byte - cnt_bits = min(bits_remaining, 8 - start_bit) - mask = (2 ** cnt_bits) - 1 - # take this many bits after the start_bit - bits = (b >> start_bit) & mask - # add these bits to the result - result |= bits << shift - # update the remaining bit count - shift += cnt_bits - bits_remaining -= cnt_bits - if bits_remaining == 0: - break - return result - - def __str__(self): - return "%d byte packet%s" % (self.size_bytes, " (truncated)" if self.truncated else "") - - -class TraxMessage(object): - def __init__(self, packets, truncated=False): - """ - Create and parse a TRAX message from packets - :param packets: list of TraxPacket objects, must not be empty - :param truncated: whether the message was truncated in the stream - """ - assert len(packets) > 0 - self.packets = packets - self.truncated = truncated - if truncated: - self.msg_type = None - else: - self.msg_type = self._get_type() - - # Start and end of the instruction range corresponding to this message - self.pc_start = 0 # inclusive - self.pc_end = 0 # not inclusive - self.pc_target = 0 # PC of the next range - self.is_exception = False # whether the message indicates an exception - self.is_correlation = False # whether this is a correlation message - - # message-specific fields - self.icnt = 0 - self.uaddr = 0 - self.dcont = 0 - - # decode the fields - if not truncated: - self._decode() - - def _get_type(self): - """ - :return: Message type, one of TVAL_XXX values - """ - return self.packets[0].get_bits(0, 6) - - def _decode(self): - """ Parse the packets and fill in the message-specific fields """ - if self.msg_type == TVAL_INDBR: - self.icnt = self.packets[0].get_bits(7, -1) - self.btype = self.packets[0].get_bits(6, 1) - self.uaddr = self.packets[1].get_bits(0) - self.is_exception = self.btype > 0 - elif self.msg_type == TVAL_INDBRSYNC: - self.icnt = self.packets[0].get_bits(8, -1) - self.btype = self.packets[0].get_bits(7, 1) - self.pc_target = self.packets[1].get_bits(0) - self.dcont = self.packets[0].get_bits(6, 1) - self.is_exception = self.btype > 0 - elif self.msg_type == TVAL_SYNC: - self.icnt = self.packets[0].get_bits(7, -1) - self.dcont = self.packets[0].get_bits(6, 1) - self.pc_target = self.packets[1].get_bits(0) - elif self.msg_type == TVAL_CORR: - self.icnt = self.packets[0].get_bits(12, -1) - self.is_correlation = True - else: - raise NotImplementedError("Unknown message type (%d)" % self.msg_type) - - def process_forward(self, cur_pc): - """ - Given the target PC known from the previous message, determine - the PC range corresponding to the current message. - :param cur_pc: previous known PC - :return: target PC after the current message - """ - assert not self.truncated - - next_pc = cur_pc - if self.msg_type == TVAL_INDBR: - next_pc = cur_pc ^ self.uaddr - self.pc_target = next_pc - self.pc_start = cur_pc - self.pc_end = self.pc_start + self.icnt + 1 - if self.msg_type == TVAL_INDBRSYNC: - next_pc = self.pc_target - self.pc_start = cur_pc - self.pc_end = cur_pc + self.icnt + 1 - if self.msg_type == TVAL_SYNC: - next_pc = self.pc_target - self.pc_start = next_pc - self.icnt - self.pc_end = next_pc + 1 - if self.msg_type == TVAL_CORR: - pass - return next_pc - - def process_backward(self, cur_pc): - """ - Given the address of the PC known from the _next_ message, determine - the PC range corresponding to the current message. - :param cur_pc: next known PC - :return: target PC of the _previous_ message - """ - assert not self.truncated - # Backward pass is only used to resolve addresses of messages - # up to the first SYNC/INDBRSYNC message. - # SYNC/INDBRSYNC messages are only handled in the forward pass. - assert self.msg_type != TVAL_INDBRSYNC - assert self.msg_type != TVAL_SYNC - - prev_pc = cur_pc - self.pc_target = cur_pc - if self.msg_type == TVAL_INDBR: - prev_pc ^= self.uaddr - self.pc_start = prev_pc - self.pc_end = prev_pc + self.icnt + 1 - if self.msg_type == TVAL_CORR: - pass - return prev_pc - - def __str__(self): - desc = "Unknown (%d)" % self.msg_type - extra = "" - if self.truncated: - desc = "Truncated" - if self.msg_type == TVAL_INDBR: - desc = "Indirect branch" - extra = ", icnt=%d, uaddr=0x%x, exc=%d" % (self.icnt, self.uaddr, self.is_exception) - if self.msg_type == TVAL_INDBRSYNC: - desc = "Indirect branch w/sync" - extra = ", icnt=%d, dcont=%d, exc=%d" % (self.icnt, self.dcont, self.is_exception) - if self.msg_type == TVAL_SYNC: - desc = "Synchronization" - extra = ", icnt=%d, dcont=%d" % (self.icnt, self.dcont) - if self.msg_type == TVAL_CORR: - desc = "Correlation" - extra = ", icnt=%d" % self.icnt - return "%s message, %d packets, PC range 0x%08x - 0x%08x, target PC 0x%08x" % ( - desc, len(self.packets), self.pc_start, self.pc_end, self.pc_target) + extra - - -def load_messages(data): - """ - Decodes TRAX data and resolves PC ranges. - :param data: input data, bytes - :return: list of TraxMessage objects - """ - messages = [] - packets = [] - packet_start = 0 - msg_cnt = 0 - pkt_cnt = 0 - - # Iterate over the input data, splitting bytes into packets and messages - for i, b in enumerate(data): - if (b & MSEO_MSGEND) and not (b & MSEO_PKTEND): - raise AssertionError("Invalid MSEO bits in b=0x%x. Not a TRAX dump?" % b) - - if b & MSEO_PKTEND: - pkt_cnt += 1 - packets.append(TraxPacket(data[packet_start:i + 1], packet_start == 0)) - packet_start = i + 1 - - if b & MSEO_MSGEND: - msg_cnt += 1 - try: - messages.append(TraxMessage(packets, len(messages) == 0)) - except NotImplementedError as e: - sys.stderr.write("Failed to parse message #%03d (at %d bytes): %s\n" % (msg_cnt, i, str(e))) - packets = [] - - # Resolve PC ranges of messages. - # Forward pass: skip messages until a message with known PC, - # i.e. a SYNC/INDBRSYNC message. Process all messages following it. - pc = 0 - first_sync_index = -1 - for i, m in enumerate(messages): - if pc == 0 and m.pc_target == 0: - continue - if first_sync_index < 0: - first_sync_index = i - pc = m.process_forward(pc) - - # Now process the skipped messages in the reverse direction, - # starting from the first message with known PC. - pc = messages[first_sync_index].pc_start - for m in reversed(messages[0:first_sync_index]): - if m.truncated: - break - pc = m.process_backward(pc) - - return messages - - -def parse_and_dump(filename, disassemble=WITH_GDB): - """ - Decode TRAX data from a file, print out the messages. - :param filename: file to load the dump from - :param disassemble: if True, print disassembly of PC ranges - """ - with open(filename, 'rb') as f: - data = f.read() - - messages = load_messages(data) - sys.stderr.write("Loaded %d messages in %d bytes\n" % (len(messages), len(data))) - - for i, m in enumerate(messages): - if m.truncated: - continue - print("%04d: %s" % (i, str(m))) - if m.is_exception: - print("*** Exception occurred ***") - if disassemble and WITH_GDB: - try: - gdb.execute("disassemble 0x%08x, 0x%08x" % (m.pc_start, m.pc_end)) # noqa: F821 - except gdb.MemoryError: # noqa: F821 - print("Failed to disassemble from 0x%08x to 0x%08x" % (m.pc_start, m.pc_end)) - - -def main(): - if sys.version_info[0] < 3: - print("WARNING: Support for Python 2 is deprecated and will be removed in future versions.", file=sys.stderr) - elif sys.version_info[0] == 3 and sys.version_info[1] < 6: - print("WARNING: Python 3 versions older than 3.6 are not supported.", file=sys.stderr) - if len(sys.argv) < 2: - sys.stderr.write("Usage: %s \n") - raise SystemExit(1) - - parse_and_dump(sys.argv[1]) - - -if __name__ == "__main__" and not WITH_GDB: - main() diff --git a/docs/en/get-started/macos-setup.rst b/docs/en/get-started/macos-setup.rst index 88737a4493..0f31f965e9 100644 --- a/docs/en/get-started/macos-setup.rst +++ b/docs/en/get-started/macos-setup.rst @@ -37,7 +37,7 @@ ESP-IDF will use the version of Python installed by default on macOS. Installing and setting up Python 3 as default --------------------------------------------- -Basing on macOS `Catalina 10.15 release notes`_, use of Python 2.7 is not recommended and Python will not be included by default in future versions of macOS. Check what Python you currently have:: +Basing on macOS `Catalina 10.15 release notes`_, use of Python 2.7 is not recommended and Python 2.7 will not be included by default in future versions of macOS. Check what Python you currently have:: python --version @@ -54,7 +54,7 @@ Below is an overview of steps to install Python 3 and making it default interpre brew install python3 ln -s /usr/local/bin/python3.8 /usr/local/bin/python - Adjust above directory name ``/usr/local/bin/python3.8`` to point where Python 3 has been installed. To check this directory you can run ``which -a python``. + Adjust above directory name ``/usr/local/bin/python3.8`` to point where Python 3 has been installed. To check this directory you can run ``which -a python3``. - If you have MacPorts_, you can run:: @@ -77,6 +77,7 @@ Python 2 deprecation Python 2 reached its `end of life `_ and support for it in ESP-IDF will be removed soon. Please install Python 3.6 or higher. Instructions for macOS are listed above. + Next Steps ========== diff --git a/docs/zh_CN/get-started/linux-setup-scratch.rst b/docs/zh_CN/get-started/linux-setup-scratch.rst index db02ee8c4b..caa6f5071d 100644 --- a/docs/zh_CN/get-started/linux-setup-scratch.rst +++ b/docs/zh_CN/get-started/linux-setup-scratch.rst @@ -13,18 +13,21 @@ - CentOS 7:: - sudo yum install git wget ncurses-devel flex bison gperf python pyserial python-pyelftools cmake ninja-build ccache + sudo yum -y update && sudo yum install git wget ncurses-devel flex bison gperf python3 python3-pip cmake ninja-build ccache + +目前仍然支持 CentOS 7，但为了更好的用户体验，建议使用 CentOS 8。 - Ubuntu 和 Debian:: - sudo apt-get install git wget libncurses-dev flex bison gperf python python-pip python-setuptools python-serial python-click python-cryptography python-future python-pyparsing python-pyelftools cmake ninja-build ccache libffi-dev libssl-dev + sudo apt-get install git wget libncurses-dev flex bison gperf python3 python3-pip python3-setuptools python3-serial python3-cryptography python3-future python3-pyparsing python3-pyelftools cmake ninja-build ccache libffi-dev libssl-dev dfu-util - Arch:: - sudo pacman -S --needed gcc git make ncurses flex bison gperf python-pyserial python-click python-cryptography python-future python-pyparsing python-pyelftools cmake ninja ccache + sudo pacman -Sy --needed gcc git make ncurses flex bison gperf python-pyserial python-cryptography python-future python-pyparsing python-pyelftools cmake ninja ccache dfu-util -.. note:: - 使用 ESP-IDF 需要 CMake 3.5 或以上版本。较早版本的 Linux 可能需要升级才能向后移植仓库，或安装 "cmake3" 软件包，而不是安装 "cmake"。 +.. 注解:: + + 使用 ESP-IDF 需要 CMake 3.5 或以上版本。较早的 Linux 发行版可能需要升级自身的软件源仓库，或开启 backports 套件库，或安装 "cmake3" 软件包（不是安装 "cmake")。 从源代码编译工具链 ================================= @@ -33,7 +36,7 @@ - CentOS 7:: - sudo yum install gawk gperf grep gettext ncurses-devel python python-devel automake bison flex texinfo help2man libtool make + sudo yum install gawk gperf grep gettext ncurses-devel python3 python3-devel automake bison flex texinfo help2man libtool make - Ubuntu pre-16.04:: @@ -49,7 +52,7 @@ - Arch:: - TODO + sudo pacman -Sy --needed python-pip 创建工作目录，并进入该目录:: @@ -69,8 +72,14 @@ 编译得到的工具链会被保存到 ``~/esp/crosstool-NG/builds/xtensa-esp32-elf``。请按照 :ref:`标准设置指南 ` 的介绍，将工具链添加到 ``PATH``。 + +停用 Python 2 +==================== + +Python 2 已经 `结束生命周期 `_，ESP-IDF 很快将不再支持 Python 2。请安装 Python 3.6 或以上版本。可参考上面列出的目前主流 Linux 发行版的安装说明。 + + 后续步骤 ========== -继续设置开发环境，请前往 :ref:`get-started-get-esp-idf` 章节。 - +请前往 :ref:`get-started-get-esp-idf` 章节继续设置开发环境。 diff --git a/docs/zh_CN/get-started/linux-setup.rst b/docs/zh_CN/get-started/linux-setup.rst index d0694a1aa1..b30c2dfdee 100644 --- a/docs/zh_CN/get-started/linux-setup.rst +++ b/docs/zh_CN/get-started/linux-setup.rst @@ -11,11 +11,13 @@ Linux 平台工具链的标准设置 - CentOS 7:: - sudo yum install git wget flex bison gperf python cmake ninja-build ccache + sudo yum -y update && sudo yum install git wget flex bison gperf python3 cmake ninja-build ccache + +目前仍然支持 CentOS 7，但为了更好的用户体验，建议使用 CentOS 8。 - Ubuntu 和 Debian:: - sudo apt-get install git wget flex bison gperf python python-pip python-setuptools cmake ninja-build ccache libffi-dev libssl-dev + sudo apt-get install git wget flex bison gperf python3 python3-pip python3-setuptools cmake ninja-build ccache libffi-dev libssl-dev dfu-util - Arch:: @@ -30,7 +32,47 @@ Linux 平台工具链的标准设置 权限问题 /dev/ttyUSB0 ------------------------------------------------------------ -使用某些 Linux 版本向 ESP32 烧写固件时，可能会出现 ``Failed to open port /dev/ttyUSB0`` 错误消息。此时，可以将当前用户增加至 :ref:` Linux Dialout 组 `。 +使用某些 Linux 版本向 {IDF_TARGET_NAME} 烧录固件时，可能会出现 ``Failed to open port /dev/ttyUSB0`` 错误消息。此时可以将用户添加至 :ref:`Linux Dialout 组`。 + +设置 Python 3 为 CentOS 默认 Python 版本 +---------------------------------------------------- + +CentOS 7 及更早的版本提供 Python 2.7 作为默认解释器。但这里推荐使用 Python 3，您可以运行下方命令安装 Python 3。或者查看当前所用系统的相关文档，按照文档推荐的其它方法安装 Python 3:: + + sudo yum -y update && sudo yum install python3 python3-pip python3-setuptools + +设置 Python 3 为默认 Python 版本:: + + sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10 && alias pip=pip3 + + +设置 Python 3 为 Ubuntu 和 Debian 默认 Python 版本 +---------------------------------------------------- + +Ubuntu（v18.04 及之前的版本）和 Debian（v9 及之前的版本）的默认解释器为 Python 2.7，但这里推荐使用 Python 3，您可以运行下方命令安装 Python 3。或者查看当前所用系统的相关文档，按照文档推荐的其它方法安装 Python 3:: + + sudo apt-get install python3 python3-pip python3-setuptools + +设置 Python 3 为默认 Python 版本:: + + sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10 && alias pip=pip3 + +.. 注解:: + 上述设置为全局设置，同时会影响到其它应用。 + +修复 Ubuntu 16.04 损坏的 pip +================================= + +``python3-pip`` 包可能已损坏无法升级。需使用脚本 `get-pip.py `_ 手动删除并安装该包:: + + apt remove python3-pip python3-virtualenv; rm -r ~/.local + rm -r ~/.espressif/python_env && python get-pip.py + +停用 Python 2 +==================== + +Python 2 已经 `结束生命周期 `_，ESP-IDF 很快将不再支持 Python 2。请安装 Python 3.6 或以上版本。可参考上面列出的目前主流 Linux 发行版的安装说明。 + 后续步骤 ========== diff --git a/docs/zh_CN/get-started/macos-setup-scratch.rst b/docs/zh_CN/get-started/macos-setup-scratch.rst index 0dba12f6b2..59e830da54 100644 --- a/docs/zh_CN/get-started/macos-setup-scratch.rst +++ b/docs/zh_CN/get-started/macos-setup-scratch.rst @@ -1,5 +1,5 @@ *********************************************** -从零开始设置 MacOS 环境下的工具链 +从零开始设置 macOS 环境下的工具链 *********************************************** :link_to_translation:`en:[English]` @@ -80,6 +80,12 @@ MacPorts 需要完整的 XCode 软件，而 homebrew 只需要安装 XCode 命 编译得到的工具链会被保存到 ``~/esp/ctng-volume/crosstool-NG/builds/xtensa-esp32-elf``。使用工具链前，请将 ``~/esp/ctng-volume/crosstool-NG/builds/xtensa-esp32-elf/bin`` 添加至 ``PATH`` 环境变量。 +停用 Python 2 +==================== + +Python 2 已经 `结束生命周期 `_，ESP-IDF 很快将不再支持 Python 2。请安装 Python 3.6 或以上版本。可参考上面列出的 macOS 安装说明。 + + 后续步骤 ========== diff --git a/docs/zh_CN/get-started/macos-setup.rst b/docs/zh_CN/get-started/macos-setup.rst index 8d56f99a2e..bd66cb0869 100644 --- a/docs/zh_CN/get-started/macos-setup.rst +++ b/docs/zh_CN/get-started/macos-setup.rst @@ -35,6 +35,50 @@ ESP-IDF 将使用 Mac OS 上默认安装的 Python 版本。 则必须安装 XCode 命令行工具，具体可运行 ``xcode-select --install``。 +安装并设置 Python 3 为默认版本 +--------------------------------------------- + +`Catalina 10.15 发布说明`_ 中表示不推荐使用 Python 2.7 版本，在未来的 macOS 版本中也不会默认包含 Python 2.7。执行以下命令来检查您当前使用的 Python 版本:: + + python --version + +如果输出结果是 ``Python 2.7.17``，则代表您的默认解析器是 Python 2.7。这时需要您运行以下命令检查电脑上是否已经安装过 Python 3:: + + python3 --version + +如果运行上述命令出现错误，则代表电脑上没有安装 Python 3。 + +请根据以下步骤安装 Python 3 并使其成为默认解释器： + + - 使用 HomeBrew_ 进行安装的方法如下:: + + brew install python3 + ln -s /usr/local/bin/python3.8 /usr/local/bin/python + + 将上述的目录名 ``/usr/local/bin/python3.8`` 修改为 Python 3 所在的目录。您可以运行 ``which -a python3`` 来查看 Python 3 所在的目录。 + + - 使用 MacPorts_ 进行安装的方法如下:: + + sudo port install python38 + sudo port select --set python python38 + +现在您可以打开终端窗口验证默认运行的 Python 版本:: + + python --version + +如果输出结果类似于 ``Python 3.8.5`` 则代表安装成功。 + +.. 注解:: + + 上述设置为全局设置，同时会影响到其它应用。 + + + +停用 Python 2 +==================== + +Python 2 已经 `结束生命周期 `_，ESP-IDF 很快将不再支持 Python 2。请安装 Python 3.6 或以上版本。可参考上面列出的 macOS 安装说明。 + 后续步骤 ========== @@ -46,4 +90,5 @@ ESP-IDF 将使用 Mac OS 上默认安装的 Python 版本。 .. _ccache: https://ccache.samba.org/ .. _homebrew: https://brew.sh/ .. _MacPorts: https://www.macports.org/install.php +.. _Catalina 10.15 发布说明: https://developer.apple.com/documentation/macos-release-notes/macos-catalina-10_15-release-notes diff --git a/tools/ci/check_build_warnings.py b/tools/ci/check_build_warnings.py index 962451ad7d..dc24b4fd67 100755 --- a/tools/ci/check_build_warnings.py +++ b/tools/ci/check_build_warnings.py @@ -30,7 +30,8 @@ IGNORE_WARNS = [ r"changes choice state", r"crosstool_version_check\.cmake", r"CryptographyDeprecationWarning", - r"Python 3 versions older than 3.6 are not supported." + r"Python 3 versions older than 3.6 are not supported.", + r"Python 2 is deprecated and will be removed in future versions." ] ] diff --git a/tools/idf.py b/tools/idf.py index 364095bb70..3474f70727 100755 --- a/tools/idf.py +++ b/tools/idf.py @@ -84,9 +84,9 @@ def check_environment(): # check Python version if sys.version_info[0] < 3: - print_warning("WARNING: Support for Python 2 is deprecated and will be removed in future versions.") + print("WARNING: Support for Python 2 is deprecated and will be removed in future versions.") elif sys.version_info[0] == 3 and sys.version_info[1] < 6: - print_warning("WARNING: Python 3 versions older than 3.6 are not supported.") + print("WARNING: Python 3 versions older than 3.6 are not supported.") # check Python dependencies checks_output.append("Checking Python dependencies...")