Update.

diff --git a/covid19.py b/covid19.py
index 78c81ed..3d80907 100755 (executable)
--- a/covid19.py
+++ b/covid19.py
@@ -43,6 +43,7 @@ with open(nbcases_filename, newline='') as csvfile:
                     if not country in nb_cases:
                         nb_cases[country] = numpy.zeros(len(times))
                 elif col_nb >= time_col:
+                    if field == '': field = '0'
                     nb_cases[country][col_nb - time_col] += int(field)
 
 countries = list(nb_cases.keys())