File name input in meca does not accept top comments

[SeismoFelix]

Description of the problem

Probably this is a minor thing, so sorry for the inconvenience and I hope it was useful for someone like me that is trying to migrate from pure GMT to PyGMT.

I installed PyGMT on Mar 25, 2022. However, I needed to use the meca feature including the option cmap and I realized that this is a recent improvement . Unfortunately, the same code that used to work with the old PyGMT version is not working with the new version unless I remove the top comment from the input file given in spec (using convention = "mt").

Text input file used to be and work:

Moment tensor list
#1: 2023_07_05_07_46
-22.19872 63.9277 6 -1.841e+22 1.235e+22 6.058e+21 -1.914e+22 1.27e+22 3.9e+22 1 0 0
#2: 2023_07_05_08_20
-22.19574 63.93407 6 -1.489e+22 2.587e+22 -1.098e+22 -2.85e+22 1.706e+22 4.669e+22 1 0 0
#3: 2023_07_05_09_49
-22.1753 63.93252 6 -6.451e+21 5.499e+21 9.525e+20 -6.693e+21 3.644e+21 1.318e+22 1 0 0

**The new PyGMT imposes removing the top comments or adding a "#" in front of the comment:

#1: 2023_07_05_07_46
-22.19872 63.9277 6 -1.841e+22 1.235e+22 6.058e+21 -1.914e+22 1.27e+22 3.9e+22 1 0 0
#2: 2023_07_05_08_20
-22.19574 63.93407 6 -1.489e+22 2.587e+22 -1.098e+22 -2.85e+22 1.706e+22 4.669e+22 1 0 0
#3: 2023_07_05_09_49
-22.1753 63.93252 6 -6.451e+21 5.499e+21 9.525e+20 -6.693e+21 3.644e+21 1.318e+22 1 0 0

Although the message is a warning the focal mechanisms are not plotted.

Minimal Complete Verifiable Example

fig.meca(
    spec='TXT/MT_sorted_by_time_colortime_version.txt',
    scale='0.5c',
    convention="mt",
    #cmap=True
)

Full error message

meca [WARNING]: No data records provided

System information

New:
PyGMT information:
  version: v0.9.0
System information:
  python: 3.8.17 | packaged by conda-forge | (default, Jun 16 2023, 07:11:34)  [Clang 14.0.6 ]
  executable: /Users/felix/opt/anaconda3/envs/mtuq_j/bin/python
  machine: macOS-10.16-x86_64-i386-64bit
Dependency information:
  numpy: 1.24.4
  pandas: 2.0.3
  xarray: 2022.11.0
  netCDF4: 1.6.4
  packaging: 23.1
  contextily: None
  geopandas: None

  ghostscript: 9.54.0
GMT library information:
  binary version: 6.4.0
  cores: 16
  grid layout: rows
  image layout: 
  library path: /Users/felix/opt/anaconda3/envs/mtuq_j/lib/libgmt.dylib
  padding: 2
  plugin dir: /Users/felix/opt/anaconda3/envs/mtuq_j/lib/gmt/plugins
  share dir: /Users/felix/opt/anaconda3/envs/mtuq_j/share/gmt
  version: 6.4.0

Old:
PyGMT information:
  version: v0.7.0
System information:
  python: 3.8.13 | packaged by conda-forge | (default, Mar 25 2022, 06:05:47)  [Clang 12.0.1 ]
  executable: /Users/felix/opt/anaconda3/envs/mtuq/bin/python
  machine: macOS-10.16-x86_64-i386-64bit
Dependency information:
  numpy: 1.23.1
  pandas: 1.4.3
  xarray: 2022.3.0
  netCDF4: 1.6.0
  packaging: 21.3
  geopandas: None
  ghostscript: 9.54.0
  gmt: 6.4.0
GMT library information:
  binary dir: /Users/felix/opt/anaconda3/envs/mtuq/bin
  cores: 16
  grid layout: rows
  library path: /Users/felix/opt/anaconda3/envs/mtuq/lib/libgmt.dylib
  padding: 2
  plugin dir: /Users/felix/opt/anaconda3/envs/mtuq/lib/gmt/plugins
  share dir: /Users/felix/opt/anaconda3/envs/mtuq/share/gmt
  version: 6.4.0

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[seisman]

Sorry, I don't fully understand your issue. Do you mean the following input file doesn't work?

#1: 2023_07_05_07_46
-22.19872 63.9277 6 -1.841e+22 1.235e+22 6.058e+21 -1.914e+22 1.27e+22 3.9e+22 1 0 0
#2: 2023_07_05_08_20
-22.19574 63.93407 6 -1.489e+22 2.587e+22 -1.098e+22 -2.85e+22 1.706e+22 4.669e+22 1 0 0
#3: 2023_07_05_09_49
-22.1753 63.93252 6 -6.451e+21 5.499e+21 9.525e+20 -6.693e+21 3.644e+21 1.318e+22 1 0 0

[SeismoFelix]

Sorry for the late reply. Yes the file you showed works. I meant if you put a comment on top without # then it does not work. Like this:

Moment tensor list
#1: 2023_07_05_07_46
-22.19872 63.9277 6 -1.841e+22 1.235e+22 6.058e+21 -1.914e+22 1.27e+22 3.9e+22 1 0 0
#2: 2023_07_05_08_20
-22.19574 63.93407 6 -1.489e+22 2.587e+22 -1.098e+22 -2.85e+22 1.706e+22 4.669e+22 1 0 0
#3: 2023_07_05_09_49
-22.1753 63.93252 6 -6.451e+21 5.499e+21 9.525e+20 -6.693e+21 3.644e+21 1.318e+22 1 0 0

Of course, is a minor thing and I can either add a # character or simply delete the comment. Still, in the previous version of PyGMT having a top comment without # was not inconvenient. Thanks

[seisman]

Sorry for the late reply. Yes the file you showed works. I meant if you put a comment on top without # then it does not work. Like this:

Moment tensor list
#1: 2023_07_05_07_46
-22.19872 63.9277 6 -1.841e+22 1.235e+22 6.058e+21 -1.914e+22 1.27e+22 3.9e+22 1 0 0
#2: 2023_07_05_08_20
-22.19574 63.93407 6 -1.489e+22 2.587e+22 -1.098e+22 -2.85e+22 1.706e+22 4.669e+22 1 0 0
#3: 2023_07_05_09_49
-22.1753 63.93252 6 -6.451e+21 5.499e+21 9.525e+20 -6.693e+21 3.644e+21 1.318e+22 1 0 0

Of course, is a minor thing and I can either add a # character or simply delete the comment. Still, in the previous version of PyGMT having a top comment without # was not inconvenient. Thanks

The file you posted should not work with any GMT or PyGMT versions. If it worked, then it's a bug. So closing the issue.