Re: [Qemu-devel] [PATCH 8/9] iotests: Modify imports for Python 3

[Cleber Rosa]

On 10/15/18 10:14 AM, Max Reitz wrote:
> There are two imports that need to be modified when running the iotests
> under Python 3: One is StringIO, which no longer exists; instead, the
> StringIO class comes from the io module, so import it from there.  The
> other is the ConfigParser, which has just been renamed to configparser.
> 
> Signed-off-by: Max Reitz <address@hidden>
> ---
>  tests/qemu-iotests/iotests.py            | 8 ++++++--
>  tests/qemu-iotests/nbd-fault-injector.py | 7 +++++--
>  2 files changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 7ca94e9278..a64ea90fb4 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -683,13 +683,17 @@ def main(supported_fmts=[], supported_oses=['linux'], 
> supported_cache_modes=[],
>  
>      # We need to filter out the time taken from the output so that 
> qemu-iotest
>      # can reliably diff the results against master output.
> -    import StringIO
> +    if sys.version_info.major >= 3:
> +        from io import StringIO
> +    else:
> +        from StringIO import StringIO
> +
>      if debug:
>          output = sys.stdout
>          verbosity = 2
>          sys.argv.remove('-d')
>      else:
> -        output = StringIO.StringIO()
> +        output = StringIO()
>  
>      logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN))
>  
> diff --git a/tests/qemu-iotests/nbd-fault-injector.py 
> b/tests/qemu-iotests/nbd-fault-injector.py
> index d45e2e0a6a..6b2d659dee 100755
> --- a/tests/qemu-iotests/nbd-fault-injector.py
> +++ b/tests/qemu-iotests/nbd-fault-injector.py
> @@ -48,7 +48,10 @@ import sys
>  import socket
>  import struct
>  import collections
> -import ConfigParser
> +if sys.version_info.major >= 3:
> +    import configparser
> +else:
> +    import ConfigParser as configparser
>  
>  FAKE_DISK_SIZE = 8 * 1024 * 1024 * 1024 # 8 GB
>  
> @@ -225,7 +228,7 @@ def parse_config(config):
>      return rules
>  
>  def load_rules(filename):
> -    config = ConfigParser.RawConfigParser()
> +    config = configparser.RawConfigParser()
>      with open(filename, 'rt') as f:
>          config.readfp(f, filename)
>      return parse_config(config)
> 

This may be a type of culture clash (on my side, due to not enough QEMU
culture), but shouldn't this be applied before anything else on this series?

I mean, PATCH 1/9 is supposed to fix the reliability aspects of
nbd-fault-injector under Python 3, but without this patch, it won't
actually run on Python 3.

Regards,
- Cleber.