Renaming Script

import os, re

rename_pairs = { #"old_name": "new_name"
"mom_grid": "MomSpaceGrid",
"mom_grid_sigma": "MomSpaceGridSig",
"rgrid": "RealSpaceGrid",
"Freq_Grid": "freq_grid_t",
"F_Grid": "fermionic_freq_grid_t",
"B_Grid": "bosonic_freq_grid_t",
"R_Grid": "real_space_grid_t",
"K_Grid": "recirpocal_space_grid_t",
"state_t": "frg_state_t",
"F_factors": "form_factors_t",
"F_factors_real": "form_factors_real_t",
"ffactor_mom": "MomSpaceFormFactors",
"ffactor_real": "RealSpaceFormFactors"}


include_dir = os.getcwd()+"/include/"
src_dir = os.getcwd()+"/src/"

header_files = filter(lambda d: (d.endswith(".h")  or d.endswith(".hpp")) and "#" not in d, map(lambda f: include_dir + f, os.listdir(include_dir)) )
src_files = filter(lambda d: d.endswith(".cpp") and "#" not in d, map(lambda f: src_dir + f, os.listdir(src_dir)) )

all_files = header_files + src_files

# prepare the regex objects
old_names_re = {}
for old_name in rename_pairs.keys():
    old_names_re[old_name] = re.compile(r'([^a-zA-Z_]|^)('+old_name+r')([^a-zA-Z_]|$)')

def apply_renames(content):
    for old_name in rename_pairs.keys():
        content = old_names_re[old_name].sub(lambda m: m.group(1) + rename_pairs[old_name] + m.group(3), content)
    return content

for f in all_files:
    print("File: ", f)
    with open(f) as f_obj:
        content = f_obj.read()
    print("Content length: ", len(content))
    new_content = apply_renames(content)
    with open(f, 'w') as f_obj:
        f_obj.write(new_content)
    print("New content length: ", len(new_content))