python - Is it possible to preserve YAML block structure when dumping a parsed document? -

-

we use pyyaml prep config files different environments. our yaml blocks lose integrity.

give input.yml ...

pubkey: |     -----begin public key-----     migfma0gcsq7opxrrqebaquaa4gnadcbiqkbgqcvrvukp6pr4qbene9lviuyfinq     qtg/ocybdxl4bh3fmuzfni+z4bh3fmux+z2n0fcv/4bpghtdl8d95npopwvo1rh2     ufhymd6dq/x9t5m+y38jmzmsvak+fqu8ya18+yqvoeyeix3gxpsgegow33gcxfjk     esugjhxcpw7opxrrcqidaqab     -----end public key-----

... executing program using python3 ...

import yaml  open('input.yml', mode='r') f:     parsed = yaml.safe_load(f)  open('output.yml', mode='w') f:     yaml.dump(parsed, f)

... produces output.yml ...

pubkey: '-----begin public key-----      migfma0gcsq7opxrrqebaquaa4gnadcbiqkbgqcvrvukp6pr4qbene9lviuyfinq      qtg/ocybdxl4bh3fmuzfni+z4bh3fmux+z2n0fcv/4bpghtdl8d95npopwvo1rh2      ufhymd6dq/x9t5m+y38jmzmsvak+fqu8ya18+yqvoeyeix3gxpsgegow33gcxfjk      esugjhxcpw7opxrrcqidaqab      -----end public key-----      '

is possible preserve structure of block using pyyaml?

yes possible pyyaml, have provide own enhanced versions of @ least scanner, parser , constructor used safe_load, emitter, serializer , representer used dump, , providing specialized string-like class keeps information it's original formatting.

this part of added ruamel.yaml (disclaimer: author of package) derived pyyaml , still keeps similar setup. using ruamel.yaml:

import ruamel.yaml yaml  yaml_str = """\ pubkey: |     -----begin public key-----     migfma0gcsq7opxrrqebaquaa4gnadcbiqkbgqcvrvukp6pr4qbene9lviuyfinq     qtg/ocybdxl4bh3fmuzfni+z4bh3fmux+z2n0fcv/4bpghtdl8d95npopwvo1rh2     ufhymd6dq/x9t5m+y38jmzmsvak+fqu8ya18+yqvoeyeix3gxpsgegow33gcxfjk     esugjhxcpw7opxrrcqidaqab     -----end public key----- """  data = yaml.load(yaml_str, loader=yaml.roundtriploader) print(yaml.dump(data, dumper=yaml.roundtripdumper, indent=4))

gives you:

pubkey: |     -----begin public key-----     migfma0gcsq7opxrrqebaquaa4gnadcbiqkbgqcvrvukp6pr4qbene9lviuyfinq     qtg/ocybdxl4bh3fmuzfni+z4bh3fmux+z2n0fcv/4bpghtdl8d95npopwvo1rh2     ufhymd6dq/x9t5m+y38jmzmsvak+fqu8ya18+yqvoeyeix3gxpsgegow33gcxfjk     esugjhxcpw7opxrrcqidaqab     -----end public key-----

at least python 2.7 , 3.5.

the indent=4 necessary roundtripdumper defaults 2 spaces indent , original indent of file not preserved (not doing eases re-indenting yaml file).

if cannot switch ruamel.yaml should able use source extract changes needed, if can can use other features comment , merge key name preservation.


Comments

Post a Comment

Popular posts from this blog

how to insert data php javascript mysql with multiple array session 2 -

-
i have method method discussed , successful data entered 1 when more 1 can not database this programs my php form : <form class="form-horizontal" id="form-produk"> <div class="control-group" > <label class="control-label" for="kelas">kategori</label> <div class="controls"> <select class='form-control' name='id_kategori'> <?php $tampil=mysql_query("select * kategori order nama_kategori"); if ($id_kat==0){ echo "<option value=0 selected>- pilih kategori -</option>"; } while($w=mysql_fetch_array($tampil)){ if ($id_kat==$w[id_kategori]){ echo "<option value=$w[id_kategori] selected>$w[nama_kategori]</option>"; } else{ echo "<option value=$w[id_kategori]>$...
Read more

multithreading - Exception in Application constructor -

-
i wanna write snake game javafx , there exception don't know , want know how fix it. ( know it's not complete yet ) and want know , class extends application ( start override ) main in other programs? see , here not static void main bc didn't need, if want add main shoud do? it's exeption... exception in application constructor exception in thread "main" java.lang.nosuchmethodexception: main_snake.main([ljava.lang.string;) @ java.lang.class.getmethod(class.java:1819) @ com.intellij.rt.execution.application.appmain.main(appmain.java:125) and code : import javafx.animation.animationtimer; import javafx.application.application; import javafx.event.eventhandler; import javafx.scene.scene; import javafx.scene.canvas.canvas; import javafx.scene.canvas.graphicscontext; import javafx.scene.input.keyevent; import javafx.scene.layout.borderpane; import javafx.scene.paint.color; import javafx.stage.stage; import java.util.arraylist; /** * creat...
Read more

windows - CertCreateCertificateContext returns CRYPT_E_ASN1_BADTAG / 8009310b -

-
i realize similar post others (e.g. this one ), there details missing posts might significant case. to start with, here's simplified program: #include "stdafx.h" #include <windows.h> #include <wincrypt.h> int _tmain(int argc, _tchar* argv[]) { // usage: certextract certpath char keyfile[] = "c:\\certificates\\public.crt"; byte lp[65536]; security_attributes sa; handle hkeyfile; dword bytes; pccert_context certcontext; sa.nlength = sizeof(sa); sa.lpsecuritydescriptor = null; sa.binherithandle = false; hkeyfile = createfile(keyfile, generic_read, file_share_read, &sa, open_existing, file_attribute_normal, null); if (hkeyfile) { if (readfile(hkeyfile, lp, getfilesize(hkeyfile, null), &bytes, null) && bytes > 0) { certcontext = certcreatecertificatecontext(x509_asn_encoding, lp, bytes); if (certcontext) { printf("yay...
Read more