program -> p_r_o_g_r_a_m
def insert_char(txt, chr):
out = ""
for t in txt:
out += t + chr
return out[:-1]
print(insert_char('program', '_'))
'_'.join('program')
np.arange(arr.max()+1)[np.bincount(arr)>1]
program -> p_r_o_g_r_a_m
def insert_char(txt, chr):
out = ""
for t in txt:
out += t + chr
return out[:-1]
print(insert_char('program', '_'))
'_'.join('program')
np.arange(arr.max()+1)[np.bincount(arr)>1]