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- import sys
- #import collections
-
-
- # custom imports
- from atom import *
-
- class PDBFile:
-
- def getContent(self, filename):
- with open(filename) as f:
- return(f.readlines())
-
- def getHeader(self):
- #Metadata = collections.namedtuple("Metadata", ["header", "compound", "source", "author"])
- Metadata = {}
- for line in self.rawLines:
- # no need to continue if meta are complete
- if(len(Metadata) <4):
- if(line[0:10] == "HEADER "):
- Metadata['header']=line
- elif(line[0:10] == "COMPND 2"):
- Metadata['compound']=line
- elif(line[0:10] == "SOURCE 2"):
- Metadata['source']=line
- elif(line[0:10] == "AUTHOR "):
- Metadata['author']=line
- else:
- # if meta are complete, stop parsing
- break
- return(Metadata)
-
- def getAtoms(self):
- self.ATOMS = []
- self.RESIDUES = []
- tempAtoms = []
- for line in self.rawLines:
- if line.startswith("ATOM" or "HETATM"):
- atom = Atom(ATOM_ID = int(line[6:11].strip()),
- ATOM_NAME = line[12:16].strip(),
- ALT_LOCAT = line[16:17].strip(),
- RES_NAME = line[17:20].strip(),
- CHAIN_ID = line[21:22].strip(),
- RES_SEQ_NB = int(line[22:26].strip()),
- RES_INSER_CODE = line[26:27].strip(),
- COORD_X = float(line[30:38].strip()),
- COORD_Y = float(line[38:46].strip()),
- COORD_Z = float(line[46:54].strip()),
- OCCUPANCY = float(line[54:60].strip()),
- TEMP_FACT = float(line[60:66].strip()),
- ELEM_SYMBOL = line[76:78].strip(),
- ATOM_CHARGE = line[78:80].strip())
- self.ATOMS.append(atom)
- # get the current indice of atom
- i = self.ATOMS.index(atom)
- # if this is a brand new residue
- if(len(self.ATOMS)>1
- and atom.RES_SEQ_NB != self.ATOMS[i-1].RES_SEQ_NB):
- self.RESIDUES.append(Residue(tempAtoms))
- tempAtoms=[]
- tempAtoms.append(atom)
- # last residue
- self.RESIDUES.append(Residue(tempAtoms))
-
- def __init__(self, filename):
- self.rawLines = self.getContent(filename)
- self.Metadata = self.getHeader()
- self.getAtoms()
- for elem in self.Metadata :
- print(self.Metadata[elem], end="")
-
-
- if __name__ == "__main__":
- if(len(sys.argv)<2):
- print("Not enough arguments! Run with --help to learn more about proper"
- "call structure and parameters.")
- else:
- pdbFile = PDBFile(sys.argv[1])
- print(pdbFile.RESIDUES[0].ATOMS["N"].COORD_X)
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