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I have a problem that started very recently. The Docker Alpine Python library is not installable any more:
apk update && apk upgrade && apk add python
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/community/x86_64/APKINDEX.tar.gz
v3.14.2-119-g9c4e1aa60c [https://dl-cdn.alpinelinux.org/alpine/v3.14/main]
v3.14.2-120-g90167408c8 [https://dl-cdn.alpinelinux.org/alpine/v3.14/community]
OK: 14943 distinct packages available
(1/1) Upgrading alpine-keys (2.3-r1 -> 2.4-r0)
0% 2% # 5% ## 7% ### 10% #### 12% ##### 15% ###### 17% ####### 20% ######### 23% ########## 25% ########### 28% ############ 30% ############# 33% ############## 35% ############### 38% ################ 41% ################## 43% ################### 46% #################### 48% ##################### 51% ###################### 53% ####################### % ############################################OK: 7 MiB in 16 packages
ERROR: unable to select packages:
python (no such package):
required by: world[python]
Exited with code exit status 1
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Alpine Linux doesn't come with Python3 pre-installed. You have to install it manually. It's very simple to do with the alpine package manager, apk .
Alpine Linux won't always be the right OS choice for IT teams, but it's an option worth consideration when lightweight container images are the goal. When it comes to Docker, sometimes less is more -- a maxim that applies especially to the base OS images installed in each Docker image.
You are trying to use the python (alias) library instead of python3.
Try to use apk update && apk upgrade && apk add python3 instead.
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