Fix semicolon issue (ecmwf#1099)

* remove semicolor from valid_time

* Linting

* add the change also for histograms

* Linting

* update fix with %Y-%m-%dT%H%M format, Linting

* remove unnecessary str

Author: SavvasMel

packages/evaluate/src/weathergen/evaluate/plotter.py

@@ -1,3 +1,4 @@
+import datetime
 import glob
 import logging
 import os
@@ -264,7 +265,12 @@ def plot_histogram(
         )
         plt.legend(frameon=False)
 
-        valid_time = str(target_data["valid_time"][0].values.astype("datetime64[m]"))
+        valid_time = (
+            target_data["valid_time"][0]
+            .values.astype("datetime64[m]")
+            .astype(datetime.datetime)
+            .strftime("%Y-%m-%dT%H%M")
+        )
 
         # TODO: make this nicer
         parts = [
@@ -437,7 +443,12 @@ def scatter_plot(
         ax = fig.add_subplot(1, 1, 1, projection=ccrs.Robinson())
         ax.coastlines()
 
-        valid_time = str(data["valid_time"][0].values.astype("datetime64[m]"))
+        valid_time = (
+            data["valid_time"][0]
+            .values.astype("datetime64[m]")
+            .astype(datetime.datetime)
+            .strftime("%Y-%m-%dT%H%M")
+        )
 
         scatter_plt = ax.scatter(
             data["lon"],