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[Breaking] Remove support for Python 3.7 & 3.8 #4756

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Merged
liliankasem merged 5 commits into from
Feb 19, 2026
Merged

[Breaking] Remove support for Python 3.7 & 3.8 #4756

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994bc55
Remove support for Python 3.7 & 3.8
hallvictoria Dec 9, 2025
5fc3dde
update release notes
hallvictoria Dec 9, 2025
3b68fe8
Merge branch 'main' of https://github.com/Azure/azure-functions-core-…
hallvictoria Feb 13, 2026
29d3b22
highlight breaking change in release notes
hallvictoria Feb 13, 2026
98cbd6b
fix static resources
hallvictoria Feb 13, 2026
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4 changes: 4 additions & 0 deletions release_notes.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@
- CLI Version: 4.3.0
- Host Runtime Version: 4.44.100 (includes 4.844.100, 4.644.100)

#### Breaking Changes

- **Python 3.7 and 3.8 are no longer supported.** These versions have reached end-of-life. Please upgrade to Python 3.9 or later to continue using Azure Functions Core Tools. (#4756)

#### Changes

- Added end-of-life warnings for all runtime versions during `func azure functionapp publish`. (#4760)
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26 changes: 4 additions & 22 deletions src/Cli/func/Helpers/PythonHelpers.cs
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Expand Up @@ -183,13 +183,13 @@ public static void AssertPythonVersion(WorkerLanguageVersionInfo pythonVersion,
ColoredConsole.WriteLine(VerboseColor($"Found Python version {pythonVersion.Version} ({pythonVersion.ExecutablePath})."));
}

// Python 3.[7|8|9|10|11|12] (supported)
// Python 3.[9|10|11|12] (supported)
if (IsVersionSupported(pythonVersion))
{
return;
}

// Python 3.x (but not 3.[7|8|9|10|11|12]), not recommended, may fail. E.g.: 3.4, 3.5.
// Python 3.x (but not 3.[9|10|11|12]), not recommended, may fail. E.g.: 3.4, 3.5.
if (pythonVersion.Major == 3)
{
if (errorIfNotSupported)
Expand Down Expand Up @@ -234,9 +234,6 @@ public static async Task<WorkerLanguageVersionInfo> GetEnvironmentPythonVersion(
// Linux / OSX / Venv Interpreter Entrypoints
var python3GetVersionTask = GetVersion("python3");
var pythonGetVersionTask = GetVersion("python");
var python36GetVersionTask = GetVersion("python3.6");
var python37GetVersionTask = GetVersion("python3.7");
var python38GetVersionTask = GetVersion("python3.8");
var python39GetVersionTask = GetVersion("python3.9");
var python310GetVersionTask = GetVersion("python3.10");
var python311GetVersionTask = GetVersion("python3.11");
Expand All @@ -249,9 +246,6 @@ public static async Task<WorkerLanguageVersionInfo> GetEnvironmentPythonVersion(
await pyGetVersionTask,
await python3GetVersionTask,
await pythonGetVersionTask,
await python36GetVersionTask,
await python37GetVersionTask,
await python38GetVersionTask,
await python39GetVersionTask,
await python310GetVersionTask,
await python311GetVersionTask,
Expand Down Expand Up @@ -608,10 +602,6 @@ public static Task<string> GetDockerInitFileContent(WorkerLanguageVersionInfo in
{
switch (info?.Minor)
{
case 7:
return StaticResources.DockerfilePython37;
case 8:
return StaticResources.DockerfilePython38;
case 9:
return StaticResources.DockerfilePython39;
case 10:
Expand All @@ -627,7 +617,7 @@ public static Task<string> GetDockerInitFileContent(WorkerLanguageVersionInfo in
}
}

return StaticResources.DockerfilePython37;
return StaticResources.DockerfilePython39;
}

// Build environment images for building native dependencies for python function apps
Expand All @@ -637,12 +627,6 @@ public static Task<string> GetDockerInitFileContent(WorkerLanguageVersionInfo in
{
switch (info?.Minor)
{
case 6:
return (DockerImages.LinuxPython36ImageAmd64, false);
case 7:
return (DockerImages.LinuxPython37ImageAmd64, false);
case 8:
return (DockerImages.LinuxPython38ImageAmd64, false);
case 9:
return (DockerImages.LinuxPython39ImageAmd64, false);
case 10:
Expand Down Expand Up @@ -674,9 +658,7 @@ private static bool IsVersionSupported(WorkerLanguageVersionInfo info)
case 12:
case 11:
case 10:
case 9:
case 8:
case 7: return true;
case 9: return true;
default: return false;
}
}
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11 changes: 0 additions & 11 deletions src/Cli/func/StaticResources/Dockerfile.python3.7
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This file was deleted.

11 changes: 0 additions & 11 deletions src/Cli/func/StaticResources/Dockerfile.python3.8
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This file was deleted.

4 changes: 0 additions & 4 deletions src/Cli/func/StaticResources/StaticResources.cs
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Expand Up @@ -34,10 +34,6 @@ public static class StaticResources

public static Task<string> DockerfileJava11 => GetValue("Dockerfile.java11");

public static Task<string> DockerfilePython37 => GetValue("Dockerfile.python3.7");

public static Task<string> DockerfilePython38 => GetValue("Dockerfile.python3.8");

public static Task<string> DockerfilePython39 => GetValue("Dockerfile.python3.9");

public static Task<string> DockerfilePython310 => GetValue("Dockerfile.python3.10");
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6 changes: 0 additions & 6 deletions src/Cli/func/StaticResources/StaticResources.props
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Expand Up @@ -58,12 +58,6 @@
<EmbeddedResource Include="$(MSBuildThisFileDirectory)Dockerfile.powershell7.2">
<LogicalName>$(AssemblyName).Dockerfile.powershell7.2</LogicalName>
</EmbeddedResource>
<EmbeddedResource Include="$(MSBuildThisFileDirectory)Dockerfile.python3.7">
<LogicalName>$(AssemblyName).Dockerfile.python3.7</LogicalName>
</EmbeddedResource>
<EmbeddedResource Include="$(MSBuildThisFileDirectory)Dockerfile.python3.8">
<LogicalName>$(AssemblyName).Dockerfile.python3.8</LogicalName>
</EmbeddedResource>
<EmbeddedResource Include="$(MSBuildThisFileDirectory)Dockerfile.python3.9">
<LogicalName>$(AssemblyName).Dockerfile.python3.9</LogicalName>
</EmbeddedResource>
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4 changes: 2 additions & 2 deletions test/Cli/Func.UnitTests/HelperTests/PythonHelperTests.cs
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Expand Up @@ -71,8 +71,8 @@ public void ShouldHaveMatchingLinuxFxVersion(string linuxFxVersion, int? major,
[InlineData("2.7.10", true)]
[InlineData("3.5.5", true)]
[InlineData("3.6.8b", true)]
[InlineData("3.7.2", false)]
[InlineData("3.8.0", false)]
[InlineData("3.7.2", true)]
[InlineData("3.8.0", true)]
[InlineData("3.9.0", false)]
[InlineData("3.10.0", false)]
[InlineData("3.11.0", false)]
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