In [1]:
    
data_string = """
1	2	3	4
11	12	13	14
21	22	23	24
31	32	33	34
41	42	43	44
51	52	53	54
"""
data_string = data_string.strip()
    
In [2]:
    
data = [line.split('\t') for line in data_string.split('\n')]
data
    
    Out[2]:
In [3]:
    
data_f = [list(map(float,line.split('\t'))) for line in data_string.split('\n')]
data_f
    
    Out[3]:
In [4]:
    
data_i = [list(map(int,line.split('\t'))) for line in data_string.split('\n')]
data_i
    
    Out[4]:
In [5]:
    
data_i = [list(map(int, row)) for row in data]
data_i
    
    Out[5]:
In [6]:
    
str0 = "\n".join(",".join(map(str, data_row)) for data_row in data_i)
print (str0)
    
    
In [7]:
    
data_string = """
1
11
21
31
41
51
"""
data_string = data_string.strip()
    
In [8]:
    
#data_string = """
#1	2	3	4
#"""
#data_string = data_string.strip()
    
In [9]:
    
import re
data = re.split("\t|\n", data_string)
data
    
    Out[9]:
In [10]:
    
data_f = list(map(float,re.split("\t|\n", data_string)))
data_f
    
    Out[10]:
In [11]:
    
data_i = list(map(int,re.split("\t|\n", data_string)))
data_i
    
    Out[11]:
In [12]:
    
str0 = "\n".join(map(str, data_i))
print (str0)
    
    
In [13]:
    
str0 = ",".join(map(str, data_i))
print (str0)