Python Message ResourceWarning: unclosed file

[theothernighttheotherday]

Hi,

I got an error message when running the Python code for Python versions 3.10 and 3.15 on GitHub when script1.py was executed. When I run the Termux OS Python 3.12, i did not have any issues.

I try tracemalloc but I am a beginner. Anybody can help or pointers in order to troubleshoot the error ?

The details are below.

Python code

exec(open('script1.py').read())

The Error message

<stdin>:1: ResourceWarning: unclosed file <_io.TextIOWrapper name='script1.py' mode='r' encoding='UTF-8'>
ResourceWarning: Enable tracemalloc to get the object allocation traceback

Python 3.10

~/ $ python3.10d
Python 3.10.19+ (heads/3.10:2f84024, Jan 21 2026, 09:33:01) [Clang 21.1.8 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exec(open('script1.py').read())
<stdin>:1: ResourceWarning: unclosed file <_io.TextIOWrapper name='script1.py' mode='r' encoding='UTF-8'>
ResourceWarning: Enable tracemalloc to get the object allocation traceback
linux
64
What is thisWhat is thisWhat is thisWhat is thisWhat is this

Python3.12

~/ $ python3.12d
Python 3.12.12 (main, Jan 18 2026, 04:37:25) [Clang 21.0.0 (https://android.googlesource.com/toolchain/llvm-project 5e96669f0 on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exec(open('script1.py').read())
linux
64
What is thisWhat is thisWhat is thisWhat is thisWhat is this
>>>

Python 3.15

~/ $ python3.15d
Python 3.15.0a5+ (heads/main:48795b64, Jan 21 2026, 11:46:27) [Clang 21.1.8 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exec(open('script1.py').read())
<python-input-0>:1: ResourceWarning: unclosed file <_io.TextIOWrapper name='script1.py' mode='r' encoding='utf-8'>
ResourceWarning: Enable tracemalloc to get the object allocation traceback
linux
64
What is thisWhat is thisWhat is thisWhat is thisWhat is this
>>>

Termux info.

~ $ termux-info
Termux Variables:
TERMUX_APK_RELEASE=GITHUB
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=11710
TERMUX_APP__DATA_DIR=/data/user/0/com.termux
TERMUX_APP__LEGACY_DATA_DIR=/data/data/com.termux
TERMUX_APP__SE_FILE_CONTEXT=u:object_r:app_data_file:s0:c55,c257,c512,c768
TERMUX_APP__SE_INFO=default:targetSdkVersion=28:complete
TERMUX_IS_DEBUGGABLE_BUILD=1
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.3
TERMUX__HOME=/data/data/com.termux/files/home
TERMUX__PREFIX=/data/data/com.termux/files/usr
TERMUX__ROOTFS_DIR=/data/data/com.termux/files
TERMUX__SE_PROCESS_CONTEXT=u:r:untrusted_app_27:s0:c55,c257,c512,c768
TERMUX__USER_ID=0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://grimler.se/termux/termux-main stable main
# root-repo (sources.list.d/root.list)
deb https://grimler.se/termux/termux-root root stable
# x11-repo (sources.list.d/x11.list)
deb https://grimler.se/termux/termux-x11 x11 main
Updatable packages:
cmake/stable 4.2.2 aarch64 [upgradable from: 4.2.1]
openjdk-25-x/stable 25.0.2 aarch64 [upgradable from: 25.0.1-1]
openjdk-25/stable 25.0.2 aarch64 [upgradable from: 25.0.1-1]
termux-tools version:
1.45.0
Android version:
14
Kernel build information:
Linux localhost 5.4.289-qgki-ga319a11388f1 #1 SMP PREEMPT Mon Oct 20 14:47:03 UTC 2025 aarch64 Android
Device manufacturer:
Xiaomi
Device model:
22111317G
Supported ABIs:
SUPPORTED_ABIS: arm64-v8a,armeabi-v7a,armeabi
SUPPORTED_32_BIT_ABIS: armeabi-v7a,armeabi
SUPPORTED_64_BIT_ABIS: arm64-v8a
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec-ld-preload.so

script.py

# A first python script
import sys
print (sys.platform)
print (2 ** 6)
x = 'What is this'
print(x * 5)

[terryjreedy]

Please ask support questions on the Help channel at discuss.python.org.