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| # app.py
import struct as st
# D - data, I - instruciya.
(Dmatrix2D, Istop)=range(2)
def make_bin_string(string:str)->tuple:
return (*map(ord, string), 0)
def make_string_from_bin(inputt, pb):
strr=""
pb_=pb
lenn=0
byte=inputt[pb_]
while byte!=0:
strr+=chr(byte)
pb_+=1
byte=inputt[pb_]
lenn+=1
return strr, lenn + 1 # s nolom.
def dump_matrix2D(matrix2D_list)->tuple: # <rows> <cols> <kol-vo elem-ov flatten kak float32> <elems>
H=len(matrix2D_list)
W=len(matrix2D_list[0])
N=W * H # kol-vo elementov v matrice.
int_length=4
float_length=4
out_vector=[0] * (N * float_length) # 4 baita dlya float 32.
N_bin=st.pack('<i', N) # na mladshih adresah starshie baiti.
out_vector_=[0] * (int_length + 2)
out_vector_[0]=H
out_vector_[1]=W
out_vector_[2]=N_bin[0]
out_vector_[3]=N_bin[1]
out_vector_[4]=N_bin[2]
out_vector_[5]=N_bin[3]
k=0
for row in range(H):
for elem in range(W):
for inner_elem in range(float_length):
elem_bin=st.pack('<f', matrix2D_list[row][elem]) # kak float32
out_vector[k]=elem_bin[inner_elem]
k+=1
out_vector_.extend(out_vector)
return out_vector_
def get_next4bytes(inputt, pb):
f=inputt[pb]
pb+=1
sec=inputt[pb]
pb+=1
third=inputt[pb]
pb+=1
fourth=inputt[pb]
return st.unpack('<i', bytes((f, sec, third, fourth)))[0]
def get_matrix_float32(inputt, pb, rows, cols, elems_N):
float_size=4
pb_=pb
out_matrix=rows * [[0] * cols]
flatten_len=elems_N * float_size
flatten=[0] * elems_N
i=0
k=0
e=0
tmp_buff=[0] * float_size
while i < flatten_len + 1 :
if k==0 or k % 4!=0:
tmp_buff[k]=inputt[pb_]
k+=1
else:
val=st.unpack('<f', bytes(tmp_buff))[0]
tmp_buff[0]=inputt[pb_]
k=1
flatten[e]=val
e+=1
i+=1
pb_+=1
for row in range(rows):
for elem in range(cols):
out_matrix[row][elem]=flatten[row * cols + elem]
return out_matrix
# Serializator.
def ser_item(inputt):
out_vector=[]
for i in inputt:
if isinstance(i, int):
out_vector.append(i)
elif isinstance(i, list):
out_vector.extend(dump_matrix2D(i))
elif isinstance(i, str):
out_vector.extend(make_bin_string(i))
return out_vector
def ser_dumps(inputt:dict):
out_vector_=[]
for i in inputt.items():
out_vector=ser_item((Dmatrix2D, i[0], i[1]))
out_vector_.extend(out_vector)
out_vector_.append(Istop)
return out_vector_
def ser(dictt, fname):
with open(fname, 'wb') as f:
vector=ser_dumps(dictt)
f.write(bytes(vector))
# Deserializator.
def deser_machine(inputt):
pb=0
data={}
float_size=4
while True:
command=inputt[pb]
if command==Dmatrix2D:
pb+=1
name, lenn=make_string_from_bin(inputt, pb)
pb+=lenn
rows=inputt[pb]
pb+=1
cols=inputt[pb]
pb+=1
elems_N=get_next4bytes(inputt, pb)
pb+=4
matrix=get_matrix_float32(inputt, pb, rows, cols, elems_N)
pb+=(elems_N * float_size - 1)
data[name]=matrix
elif command==Istop:
return data
pb+=1
def deser(fname):
content=b''
with open(fname, 'rb') as f:
content=f.read()
return deser_machine(content)
if __name__ == '__main__':
# Mogut bit tolko pryamougolnie/kvadratnie 2D spiski.
test_matrix=[[10, 11]]
test_matrix_new=[[10, 20, 30], [10, 9, 40]]
ser({'test': test_matrix, 'test_matrix_new': test_matrix_new}, 'matr.bin')
outp=deser('matr.bin')
print('outp', outp)
"""
Out:
Создается файл matr.bin.
Читается как:
outp {'test': [[10.0, 11.0]], 'test_matrix_new': [[10.0, 9.0, 40.0], [10.0, 9.0, 40.0]]}
""" |
